Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd913f24de50e5f…

MALICIOUS

PDF

70.6 KB Created: 2021-02-24 17:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a94f77b8b9a17fab084612e1769d2f0 SHA-1: b317a8dc7a1f312a8714f1409c03b0d5feef3808 SHA-256: 2bd913f24de50e5fd63f82d6f3336500069d78363112debeef382a134082d1cb
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://maypoin.ru/wix?keyword=lehigh+county+prison+jobs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463287/normal_601488dcab3b8.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/lapesebuzilalem.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/CdicMhi/wejanexufe.pdfIn PDF document text
    • http://manthoughtswebsite.website/13646669261u51m3.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/jXgdSHM/58900784732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458150/normal_5feaf590a0810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5fe52b2cc1e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_6016fec2a3f37.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/hjpkXic/maze_runner_3d_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dodixuvizovov.epizy.com/67904870101.pdfIn PDF document text
    • http://basukek.rf.gd/howrah_bridge_all_songs.pdfIn PDF document text
    • http://jamudux.epizy.com/beethoven_pathetique_sonata_op._13_-_second_movement.pdfIn PDF document text
    • http://fobonerenajob.epizy.com/eclipse_ide_for_ubuntu.pdfIn PDF document text
    • http://kixiwuru.epizy.com/lujopazavixujetedom.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_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 5212 bytes
SHA-256: a9176d282dfa5e03e502425358b9452a1b19c39b2fe9c7ae077031aa3f99e52b
font_01_sfnt_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 10220 bytes
SHA-256: 2a18b071463d94c39820a4dac82ec2452c4254f43654517a6bbfd787dc8dc9f5

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