Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb92a84871cdfd7…

MALICIOUS

PDF

62.2 KB Created: 2021-08-21 17:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b05f498ab8b24cc068c7995ccaca0cba SHA-1: db2481507f1feea93f3afb6307ea1c523595f7b9 SHA-256: 2fb92a84871cdfd7002390d3d9476c89d8b84fff876b9e3997b6323d95860d1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely to facilitate phishing attacks or distribute further malware. The presence of multiple compromised CMS upload links and disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5110

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://ketchas.ru/uplcv?utm_term=how+to+add+amiibo PDF link annotation
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/42c6e0d67f808b6a8ec137316ff4ab6a/5149107986.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1722640957---roxogijafekudi.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/dd2ihn113r2rqcu7n7oucfrr4b/56953177374.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210820043312.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/13210821604.pdfIn PDF document text
    • http://tdfinalists.ca/clients/43449/File/44184094371.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/gimugudix.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607662999a6b9---tomaliwetepos.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/34659398040.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/xonedixopisawazinoxakajos.pdfIn PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/sutavevo.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/pafobetafunoxap.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/43721dfafaf556ebc2ea5eadeb93b1df/2524311034.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086c9256dc3d---tezetaxudatexefag.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/ce7f994ccbe7cef181d83c0ed4e34013/26703109277.pdfIn PDF document text
    • http://caramelitos.sk/files/51942698807.pdfIn PDF document text
    • https://nyig.com/files/file/12248078325.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/noralor.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/67606381879.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/xofudimuzu.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/4qs04js2jjl4skhlecn94b4of2/guweninelujobu.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/28572171503.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/40433664835.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/siruzadebotusibelusepe.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b895bc8ee08---kamokevofimiwodasawes.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/tirop.pdfIn PDF document text
    • 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_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 10076 bytes
SHA-256: e5a494130bfc2c5bf6071caca4f8c7a6e296a694504613d4b1ad2256a3b1b360

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