Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b1c3c27a47e5f7…

MALICIOUS

PDF

75.0 KB Created: 2021-09-05 17:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 55219d193116fe35ca468b43c2a5de0c SHA-1: 29ebc338e4394fbfa0e7f5ce842ff817578c834f SHA-256: 29b1c3c27a47e5f73c7474092c855fb76374c19b5bf1cdd69f16f10ffe3d4cd7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple links to external sites, many of which are hosted on compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to create a link farm on disposable hosting, likely for SEO manipulation or to host malicious content. The embedded JavaScript and link farm structure suggest an attempt to redirect users to malicious payloads or phishing sites, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d0357e43567bf3a0114be236aa11a95/30876145319.pdf In PDF document text
    • https://pioneerlift.com/upfiles/editor/files/lolubup.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8487819dd9bd88a3d4f70350db0814cd/punexabi.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608930602352c---96335703496.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/puximapopoxubibajuxar.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/tazubuxidoxopawokigidejiv.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-3/20210603055850938186.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/63d406cd713ca3050be6cb14040dc982/jivif.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9d56697110098afd4377e1368eee3f6b/rezudabodixofuxopaxiwo.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2231cf99f---zogadisipobezizezivafugoz.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/l6d67sbj7ekhf3h2kl7hp5s95i/74486049615.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/vilumamape.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16085a4fe8c70a---bogikajukuzezomufer.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/wedefimagezekopinawosovim.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/nmuhbnql5cft5gksvq111ht580/jaboteregomaxalugi.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/giniputubozowelejamofo.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/51206457390.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/b6mlj7f4f1bgliv9ghn64r4hk5/muwaka.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/75135622490.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/80057183169.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24b60e12c3---fakokozake.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/gemumuluwov.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/36069805590.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/sunosunogolobekotedojoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=opel%2Fvauxhall+corsa+service+and+repair+manualPDF 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_off0000c192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC192 16684 bytes
SHA-256: 008efe410fa18bf11e8364361e7dd995544d085b294cc76382f9245179ba105c
font_01_sfnt_off0000ecb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 11008 bytes
SHA-256: 6bf5d6c2b732d5a93c1cdd8ffeb50ec4a92088151b031f758b46093db3950f0b
font_02_sfnt_off00010633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10633 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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