Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8200459eeccc460…

MALICIOUS

PDF

74.8 KB Created: 2021-03-20 21:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 60cf93dcc910951a36ad424e858c124e SHA-1: 1836c8ee4997d30b96e54656d68558a9e06a3b9d SHA-256: f8200459eeccc46029901ed14b9efbfc9b8845aecf6914ad73057f98c2b6fcc4
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 0.9995

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://midufefew.ru/aws?utm_term=how+to+use+fabric+softener+in+amana+washer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409394/normal_5fe92e04d743b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_604856fbc5823.pdfIn PDF document text
    • https://kuvikopar.weebly.com/uploads/1/3/4/8/134870245/2731084.pdfIn PDF document text
    • https://cdn.sqhk.co/noruwotil/e3ihtxF/tusozezewulunipotodiriti.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/cb3abafcdb4c5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_6028eb6557bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_605472ea4dbb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376875/normal_5fcbe82b7900e.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/Rjbidaw/claw_machine_game_buy_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_602aaf8869b24.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/8ANfBgd/knife_hit_2_crazy_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5feb3ce29ffcf.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/hhgeijx/56506888744.pdfIn PDF document text
    • https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/5449557.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/vZiaohd/57856482716.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/Xih6haH/wazibumozuwusubunanig.pdfIn PDF document text
    • https://cdn.sqhk.co/juzogimuju/aiaRhHf/gun_manufacturing_companies_in_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/vemupanilow/iihhifm/vopofosolab.pdfIn PDF document text
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/dodajoxavoxep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_03d2ad76d30e43159f257adc05baaae3.pdf?index=trueIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_4a4240e852ed46c0bdd5e9f73cdaa271.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_5e42d224e9d949db804e3dd2c473f3dc.pdf?index=trueIn 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_off0000e6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AB 5280 bytes
SHA-256: 1f700e134dd971d5d3184846acb672310c55952fe0b802a51f36adc93a8bdf8d
font_01_sfnt_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 10780 bytes
SHA-256: fd33f61017a8edec91df4d28418efb2c59ded9649336d5b734884391e48f58b4

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