Malicious PDF — malware analysis report

Static analysis result for SHA-256 5849a370d08cc3dd…

MALICIOUS

PDF

70.6 KB Created: 2020-11-21 08:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 11b4241e74c0975731bb8234d793f648 SHA-1: 9642a8cabef97346a45cfb2efde99d4887f3ba76 SHA-256: 5849a370d08cc3dd150862437ba2ab878a8643706538b4382e0da9ef5283bf15
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://trafficel.ru/123?utm_term=how+do+you+deadhead+rose+campion PDF link annotation
    • https://kumupesefutevun.weebly.com/uploads/1/3/4/4/134463509/loduzisogev-nabaxapakudater.pdfIn PDF document text
    • https://logozirajukafod.weebly.com/uploads/1/3/4/8/134848231/8b6c2fe744fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f8a08a6595d8.pdfIn PDF document text
    • https://suranetu.weebly.com/uploads/1/3/4/4/134458043/limevubabupokonip.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/8020923.pdfIn PDF document text
    • https://wusiparopebabo.weebly.com/uploads/1/3/4/5/134505529/5960006.pdfIn PDF document text
    • https://nujusokomofevak.weebly.com/uploads/1/3/4/5/134503883/mivadozazasuwelulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dac5af8c-4668-4a6b-b1db-453d69697dae/tuwomov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace126a7-fbf9-4407-8253-3c94fb26fb7a/57834795843.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/komatedugujutaxemufobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a6b018-ac9b-4130-a20c-6cfa2ccac693/ketusol.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/garutunibujozowalafesewe.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/rikoxemarexozunepo.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/playstation_1_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB81 5240 bytes
SHA-256: fd6cb48257cd930ab1cafa74b8e59df485e55c8e8e3cb2e14b6ab292003a29f3
font_01_sfnt_off0000dd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD35 9920 bytes
SHA-256: a51382c7d84183538bb416e378da22877ed287e375695a21d7aeece7af9d38b4
font_02_sfnt_off0000ff23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF23 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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