Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bcf32e6529bf56…

MALICIOUS

PDF

97.2 KB Created: 2021-06-21 13:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7d5c0ec919ffda38c983d6f78a912d6e SHA-1: 499be08fb9fef1f88b76655247b885965c70efd9 SHA-256: 80bcf32e6529bf5626116d765b3d3215ed99d281a2c8d412e126a33cac74c594
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, many of which host other PDFs. The document body, though heavily obfuscated, appears to be a lure related to 'Branham audio sermons' and includes metadata from wkhtmltopdf, suggesting it was generated programmatically. The presence of multiple links to compromised CMS uploads indicates a pattern of distributing malicious content through these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://rld-carbon.ru/file/kinesewurowovivaritapipir.pdf In PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/qtdasclmds4251f0qokkal7b3t/12469296504.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a78b149bfe4---pemitaroxokomowo.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6ceb94ffd---78305798724.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/73fbnpopb2knf03qspq69bjmk0/kutowazak.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92318e49a---risurutazojo.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160986b2f32ff5---kudefuxoromulodid.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/segijuga.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jejazoru.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/wojiva.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/muucj48jj6ggeumvn3rfo8cl3a/rewizupenub.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9560b5b3d---wetimupitu.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/minowozuxumesipavije.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/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=branham+audio+sermonsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E1D 5084 bytes
SHA-256: 0946070feea1678bccb531227fb3d8431821ebc9fec16095a0a69c93647a9ffe
font_01_sfnt_off00014f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F33 12436 bytes
SHA-256: 808d245a9d1dcf70ff7be00b07afe0dc6b60f0a84ec0ad18a5c35d1c8f809dda

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