Malicious PDF — malware analysis report

Static analysis result for SHA-256 5325ff46bb39b970…

MALICIOUS

PDF

65.1 KB Created: 2021-06-23 19:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 742a8d8c638b316c59e3b9980dc425d9 SHA-1: 0111e1bfe85b81c28b8f0316ecbd2bb81d0a1ac2 SHA-256: 5325ff46bb39b9702580218f19bb243f73513184234dd7e3bf5ec1dbda1db452
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely attack pattern involving redirection for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8593

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://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626e38d20f---tulanetajijijer.pdf In PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/94613uuqj6urcb2isujji1nut2/mojezopi.pdfIn PDF document text
    • http://ruresept.ru/files/file/33727841759.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/vogepijozuzi.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/0iknp3o9krp1ul0kj0p7o3jbb3/rurozawegewugotoguk.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/kunagap.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210603080845.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/09b88630d002349fb72d7cc9edfddc05/49263570902.pdfIn PDF document text
    • https://anfauglir.com/images/file/nuvataxulorepixapiwexax.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/441fe6e6a75f62229b312bc40426e8d2/faxavi.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0c1f4ed79d2abafebac6d7faaa97bd61/zogutesok.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/es2n1683nfq18dvucggdcoqet7/fiwedikezulibaxuvezaferi.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7149a0ece5---77977927874.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/91165695038.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c84ae0a3fa---pugesum.pdfIn PDF document text
    • http://bociany.sk/media/file/37112048437.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=computer+hardware+fundamentals+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 5276 bytes
SHA-256: b1843b6bbe8e525e1189d53fd2194ba64e86ee131c4c75cb0585d11a5f2085c6
font_01_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 10508 bytes
SHA-256: 9487c721e34e4ea63360a52d18f30407c3347f28524af421a86948cd87591dbc

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