Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab0e26e65993146…

MALICIOUS

PDF

79.8 KB Created: 2021-05-29 16:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3f0cf9f186d36ef8a61461dd30146cb SHA-1: 5141533e1d84ef35ddc025c9bdd0358ad87e7975 SHA-256: 6ab0e26e659931463353a2eae7a5a7bcd365f87481b2475d48f524031bf75c9e
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The presence of 'Pdf.Phishing.Trojan' from ClamAV and a high ML classifier score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a phishing or content-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/123?utm_term=russian+tv+channels+app+for+android
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/1552683.pdf
    • https://cdn-cms.f-static.net/uploads/4374536/normal_602b448211558.pdf
    • https://static.s123-cdn-static.com/uploads/4374835/normal_5feffd8b55d16.pdf
    • https://cdn-cms.f-static.net/uploads/4460233/normal_602d0c9addd97.pdf
    • https://wapawovukeped.weebly.com/uploads/1/3/5/3/135333371/kibawe.pdf
    • https://kuwodugedo.weebly.com/uploads/1/3/0/7/130739904/4263730.pdf
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5fea22fc40c62.pdf
    • https://cdn-cms.f-static.net/uploads/4412775/normal_6065b12caa3ba.pdf
    • https://vipeketiduwe.weebly.com/uploads/1/3/1/6/131636725/wumipuw-xedizeretifoze-jirofenetuto-tibuzi.pdf
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/2995499.pdf
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/jiwunud_zeromodumafego_wigotezurox_piwobufuzo.pdf
    • https://lexifomaxinu.weebly.com/uploads/1/3/4/5/134595187/a8448.pdf
    • https://xeluluferira.weebly.com/uploads/1/3/4/2/134266649/tunumijepabezo.pdf
    • https://zuwexonoporij.weebly.com/uploads/1/3/5/3/135317719/cbbd1d.pdf
    • https://xijanejomasug.weebly.com/uploads/1/3/4/5/134506458/dagetupazivoputo.pdf
    • https://cdn-cms.f-static.net/uploads/4421472/normal_604ddb4619ed1.pdf
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/3358069.pdf
    • https://gamurewum.weebly.com/uploads/1/3/4/4/134437387/somobe.pdf
    • https://static.s123-cdn-static.com/uploads/4491155/normal_5ff773c959a3f.pdf
    • https://cdn-cms.f-static.net/uploads/4381551/normal_6061764e544db.pdf
    • https://viriparerari.weebly.com/uploads/1/3/5/9/135978168/7250892.pdf
    • https://seroselek.weebly.com/uploads/1/3/4/6/134636573/9769630.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbaa.bin
4116b7e9a5c25308ad065e8ec2ed1a263ad65ce320cc8cda99bf6fed8bf8e906
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 5312 bytes
font_01_sfnt_off00010dc1.bin
06e6134fb2071005cc03e86767b9355864bedfefaee9a2016d28d22167f66960
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 10564 bytes