Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f872e94c18f724f…

MALICIOUS

PDF

105.5 KB Created: 2021-07-15 23:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 022c37ffa1bd39133550cff166c22b68 SHA-1: 9ffb5fbb3a9300488cc441056143952f4f53ffe9 SHA-256: 2f872e94c18f724f6f182f5cdb21af9fd623d8bf8def3e2182cee0233ed99736
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely serves to redirect the user to one of the numerous external links, which are designed to host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://catamma.ru/uplcv?utm_term=joey+bendy+and+the+ink+machine PDF link annotation
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795ff6d222e---nipida.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/24964351062.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5dacbbcac---lakenuretiloz.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/jituzikogutenetud.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/4380052231.pdfIn PDF document text
    • https://noddy.nu/images/file/zemaribarewusuxixazegoxi.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d91c8426e0d---34929325087.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/toxakuzagelusunukerosoj.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/78333954093.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/77d0a2167b3416863808c6deaa388368/gisilirametixudetada.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5e4d6f1e0---purewanoxerogisatedapa.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/48739074481.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5e703ae89---tokitezuzegisiwug.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/baa399aec8be52b0cdb1b48ea276b688/17830583651.pdfIn PDF document text
    • https://hirurgija.me//files/51116787702.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/82862619866.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/72802136760.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096e6b46bf1d---zemotapivepala.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/4d056a30c78126f0b335ed2257de2e3b/domokovizebogelefik.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8809a3eddb---zabenuledarojaxorev.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a8dbe4e39---vixekabewodeb.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160820647d4127---pebiwakejoban.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b7973a01d---fituredugu.pdfIn PDF document text
    • http://meskerjager.nl/media/files/51716263336.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/91355883168.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b78d854214232bd1f4c45f088d163941/rofodelikasajemomi.pdfIn PDF document text
    • 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_off00013cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDE 17224 bytes
SHA-256: 13cb7530bab4ca8c23e8fff1d2e7a141389f4148cc6fd51f0657511bf6e7ea47
font_01_sfnt_off00016962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18179 10660 bytes
SHA-256: ee99fd1c76ada35f67f9f76f52da29e4520a990e6b48a6a65785018404a24370

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