Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0407d2266561cb…

MALICIOUS

PDF

86.3 KB Created: 2021-03-24 20:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d0c468244e5d51d72795b17d7b0734e SHA-1: 9b62cb1738635c768788b36de6874e1b31038234 SHA-256: df0407d2266561cb613b42527228ef376ad4d61d8ee1b23ecfa63df075ddd940
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://fokemale.ru/wix?keyword=gold+miner+hacked+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379961/normal_6017203ddb1c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_601dd87a9cd80.pdfIn PDF document text
    • https://kivisazof.weebly.com/uploads/1/3/2/6/132696558/patowatogif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446507/normal_5fd9de08ea29c.pdfIn PDF document text
    • http://nujanafuvasas.iblogger.org/6161885581.pdfIn PDF document text
    • https://fikakexuk.weebly.com/uploads/1/3/0/7/130775276/7465f4c861ec0f9.pdfIn PDF document text
    • http://xotalazapu.iblogger.org/82307202101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_5fe97e8ae6421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_60249572d6f2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://podijasopasul.epizy.com/bank_exam_maths_book.pdfIn PDF document text
    • http://kikodanaso.epizy.com/biology_experiments_for_class_12.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/towexumidagumosizowolu.pdfIn PDF document text
    • http://paxajuleki.rf.gd/how_to_open_yamaha_remote_control.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_388207f7eb074845b79cbeb888d923e0.pdf?index=trueIn PDF document text
    • http://jijomelaj.rf.gd/arun_academy_current_affairs.pdfIn PDF document text
    • http://biborufa.epizy.com/hollow_knight_106_speedrun_guide.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_644d54a108dd4c4a8bf9b4258c8a8eb9.pdf?index=trueIn PDF document text
    • http://tipixerokofor.epizy.com/69041627557.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_db7ef979f24d41068f7b842c50a4cabd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxorojero/77581837187.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/nafaj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001132b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132B 5228 bytes
SHA-256: 9681819cc25b3614c0738c638054bab0a7434f23b2ad6c714cdc3ae654de77e6
font_01_sfnt_off000124cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CB 11712 bytes
SHA-256: cd8eccc1819a8df5ddf54e5f1ecf7772731ba456928063197566542685727482

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