Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7124ab261f3074…

MALICIOUS

PDF

76.6 KB Created: 2020-11-18 14:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 113a00e2b266cfa54c721e37def4d87c SHA-1: 1878e8162ad2e1f97365ce078108fc00283a9148 SHA-256: ea7124ab261f3074e651a9ca96d1653e64cff08d38843ac8b4be4fb5c8964e5e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly and S3 domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the attack pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://traffnew.ru/aws?utm_term=apc+smart+ups+750+manuale+italiano PDF link annotation
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/zanefuberebex.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/bbba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5fa5b296864d2.pdfIn PDF document text
    • https://vozutububedem.weebly.com/uploads/1/3/4/3/134372478/kivofosivipa-vininudabu.pdfIn PDF document text
    • https://gupenuwod.weebly.com/uploads/1/3/4/5/134518336/5262639.pdfIn PDF document text
    • https://xobesatiwum.weebly.com/uploads/1/3/4/3/134359431/9331110.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/92271146572.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/ragnarok_mobile_assassin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/fosarexetenonop.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/adam_curtis_williams_forum.pdfIn PDF document text
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5D 5416 bytes
SHA-256: 0796d124c0851aab6de803eeec7dc998bb87eda5a2d584cb3b6d9a7f22fc6f4f
font_01_sfnt_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 15552 bytes
SHA-256: cbda3195509b10fb17d689c20b33a84ab3590ef74ac11aac011936f3cc158142
font_02_sfnt_off00010eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB9 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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