Malicious PDF — malware analysis report

Static analysis result for SHA-256 701f8eabf65c4887…

MALICIOUS

PDF

58.0 KB Created: 2021-09-01 21:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9ca111ac0ca32b1f8e14335fb895cda2 SHA-1: 7466e3b4719eec2cefd48719d305193d2b063fb2 SHA-256: 701f8eabf65c48872e62afc70ed2d78367840232c443203dc1095d1c3ac53d26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6993

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 https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/10201d65dabf6ed2b0075c54a7998f92/77135035273.pdf In PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/787e975cd1b8d7ddc844d1e159341ea0/kapowegepuresepejep.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/19749091075.pdfIn PDF document text
    • https://harom.ro/files/file/62612904115.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/toligisemelexavitalanim.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807aa7b9a35---62354488434.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/bb685ca704c760d3db79ffd920d97516/406907614.pdfIn PDF document text
    • http://didopack.com/files/38791340794.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13386448198.pdfIn PDF document text
    • http://ned.ru/uploads/files/67601872914.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/lizawujasafida.pdfIn PDF document text
    • https://petala.gr/userfiles/file/jisaguroranubakadu.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/vovukisumawogi.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/9718d729f7a1d99d16b3ac60035d0a33/difimuf.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/15168431000.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072a4769dc2b---nunaneb.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/47564960194.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/9pi742ncdfmr28vnj5qpsu04oa/34000808646.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/60e46ffee0445e3792a333c308d86876/61263285088.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/49532072878.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608497242ed5c---fekurazifapapij.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/dabubameremudinu.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/27348123050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=mohave+county+taxesPDF 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_off0000c135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC135 17192 bytes
SHA-256: 72ae75e44469bdc30155d372358b02ba245e3ae5086c50cc77ec5c463bb63b66

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