Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5936e6bb8ff6c3…

MALICIOUS

PDF

88.5 KB Created: 2021-09-01 03:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a9f74716af671fb4f66dce49ce5bb0d0 SHA-1: 08fca04331d645ce2d46f88cef0a35a5e553a606 SHA-256: 9a5936e6bb8ff6c38a13f123dea90da01f032bf72ee1d0d0351352fc9b49e327
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous links pointing to compromised WordPress sites suggests an attempt to distribute further malicious content or phish users. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates a common tactic to bypass gateway security by instructing users to decrypt an archive, likely containing a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/96482598236.pdf In PDF document text
    • https://mamap.in/ci/userfiles/files/rinaroworuladovewum.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0d6f730b9---38199390093.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e657927a---98392677248.pdfIn PDF document text
    • http://vswet.ru/f/47101687465.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2567f346804cd8c329b873b234d3fd26/95052849784.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/6fd479ca2d2e874bfffac0f63c4a2e9e/40119421296.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fe363469037---vugifimutalotokidolil.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/rukuxatijuragu.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/tolibinisesuvunu.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/fufewun.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/4mja7g5pkjf3alkb43vk8lkqf9/50011450147.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a01f7d089---runararimezolimatu.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s80mfjls3bjpijkkj1tgoml7k1/fetiw.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/zibadixogogojaliboz.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/0tdme456qnlp6ftkhhcsdr5iuf/lojijurelevabilijupitiba.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/36568205733.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a3d29e7b0f132c0540813effbadb5df6/37462369011.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/lerepiwafijixilezofomovut.pdfIn PDF document text
    • http://wych123.com/upload/files/raletutaxavupu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/bdb1b5fde4b2e03e218f961c86744b20/leluxupupanosewunu.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/pokugugodo.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161131f626ee9f---nobuvu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965a6e44338---84241124057.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/maxuvasulit.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983db80d8f3---goxujimamadulowan.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210809201844255024mj2rgu.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/99435825383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=table+tennis+questions+and+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 18080 bytes
SHA-256: b5b2086c4b8ade738cf99e6fa1d650e259d7e1300853abbaef757659d51f4b04
font_01_sfnt_off00012355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12355 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6C 10676 bytes
SHA-256: d7c266a901f1744b3c2df38df6e0c29554636101147f01d744243aa5e06d232c

Open this report in the interactive analyzer, or submit your own file for analysis.