Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6cbb18fee29a1e…

MALICIOUS

PDF

66.6 KB Created: 2021-08-16 12:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 760ed29f64749311f6f7483152aabace SHA-1: 1c8b1ff2aae80106ed0e46cc2cb30f2fd2049cbf SHA-256: bf6cbb18fee29a1e4818415497f7115351ee9907944041cc654eb35b4a864f68
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to numerous websites, some of which are hosted on compromised CMS uploads. The primary function appears to be redirecting users to potentially malicious or SEO-manipulated content, rather than delivering a direct payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8521

Heuristics 5

  • 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
  • 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 http://alphabodysupplements.com/newerac2c/userfiles/file/42233525322.pdf In PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/gizaj.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/turadamemosilobumi.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/14843953988.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/f325680b48e225bb0db43d8da1877658/50546723600.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/nidanudefebibulaxiwipiwo.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/5683785221.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/susovalazas.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b89970ca521---xiguxubazariniwezu.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/federof.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9091f331e5---86881411477.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/49616194119.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/61505771615.pdfIn PDF document text
    • http://ge-mak.com/files/zomunododozogir.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/forigu.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3714126fb---ketajetekapimavinoluvetot.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-08-14/images/files/42911294691.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/titiwobobopagezapabuvo.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42e3263e28---71551838465.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad026c3e37a---zibonawikulizevoforagova.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/v5k3j07fnks5a4o5b9qv2dll39/betifalanusixudozilo.pdfIn PDF document text
    • http://teplospectr.ru/images/files/78867145534.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/kulifowadumos.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6acaaf233---zuridixamutelo.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae1b3acfa---xepavubulanelovapava.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=grade+9+mathematics+module+5+quadrilaterals+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 18032 bytes
SHA-256: c9ee97d9e73c66aafa0fa722326efd5aeb5ff97e6638077ea2a18c4ed486c658