Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d47f0332e3f5f8…

MALICIOUS

PDF

76.8 KB Created: 2021-02-21 18:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b7fbe95d358b13d621ce03a2f5e1900c SHA-1: 9df4d28f1d82842c596f0cc8967e95a6509ebbb3 SHA-256: 49d47f0332e3f5f8d773fc3b6b0ccd39ba57ed07fb67731b060232ca6e762492
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 0.9998

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
  • 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://leonvi.ru/123?utm_term=cisco+dpc3825+no+internet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470399/normal_601305f249824.pdfIn PDF document text
    • https://boboxike.weebly.com/uploads/1/3/2/7/132710801/7528a9b11e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_6018384fb4732.pdfIn PDF document text
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/jasezafetuxiru_vodemutina_saziwefakarap_gizajukigavuriz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5fdfc896a2edd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_6009f73289c93.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/2342077.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/fasiraxezigakivorow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_6025c702a852f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415292/normal_5fd3b5bc32281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5ffe959711062.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/2691632.pdfIn PDF document text
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/voxatujiluzaxuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimomug.rf.gd/vuvufufovolojo.pdfIn PDF document text
    • http://pemukusa.epizy.com/adjective_adverb_and_noun_clauses_worksheet.pdfIn PDF document text
    • http://dupenodigilezex.rf.gd/covid_19_safety_policy_for_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/stokke_tripp_trapp_high_chair_weight_limit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 5344 bytes
SHA-256: 5fc1a88355c1450419a63e33a9a7f0fc85659d49160b34d0312aa1fa3f42b644
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 11728 bytes
SHA-256: 82ab718d6ab6907bba80f61ae9d241e8ea92114c1b6a73490775ca67799a06d6

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