Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c01d40995ca64e4…

MALICIOUS

PDF

84.4 KB Created: 2021-09-12 11:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8fd96ae37bd2c4d505911767e21877c8 SHA-1: bd357f755250c3249cd8f3c81e6ce0916b1125ff SHA-256: 9c01d40995ca64e421d86ec4da3338063f70945228ea4aea5a68081ea2a0ad43
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories and disposable hosting. The document body is unreadable, but the presence of numerous links to potentially malicious content suggests an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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.
  • 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://mcdelandes.ca/uploads/file/20142333411.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b0ba129387b349ba886eb32161b26449/korakimuliriket.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/remopebimoxiwotugim.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/lubogatomexokaresepe.pdfIn PDF document text
    • http://vhktn.at/images/content/files/72649903894.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/26084433462.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109032103203221.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d78d8d9411---kupafiradirakenufatit.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/kozugeverubiragogonigotud.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/pokodujivukotupalo.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/vidurega.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/revemulaxekixuligafaw.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/e93c922800b5ebef6798f4135331ae46/lugenirerinojewulirirefe.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/jevexemebal.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/31955218412.pdfIn PDF document text
    • http://novafish.it/userfiles/files/76443255732.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/mivomepedotujefomelaxula.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/gabasutekesutajivadite.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86335497416.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/bumenijekikafolej.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/nigadifosibopotigozuf.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/2pk330qma7i2smb48g10ju2i15/71799730292.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/fedekasovobiz.pdfIn PDF document text
    • http://steinemann-ag.ru/wozufigis.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/61410904829.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/wopewurat.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/57479450179.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612e9934cf5ac---81919175358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=super+bear+adventure+gamesPDF 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_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC84 17868 bytes
SHA-256: 060055d81f095c92ca75d15749c2e597e2241a1a3855b6a398ad01768af54d79
font_02_sfnt_off00012aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AED 10860 bytes
SHA-256: e6bd9fd544bc977d33726338a4d4efa6eb555de3a081b2d3587b4bfb768b07a3

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