Malicious PDF — malware analysis report

Static analysis result for SHA-256 a949961ca6c8aa64…

MALICIOUS

PDF

71.7 KB Created: 2021-03-30 04:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0097149eb0dfd9b97ccbd5317cf97792 SHA-1: 5b291c7be5f9a8fc3efe0ecd6d5808b53a6a3d26 SHA-256: a949961ca6c8aa64f434e78a9d405345c2ef2d5d086b651147c99927aa8f0c41
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://vilenefex.ru/strik?utm_term=dometic+rm2652+control+board PDF link annotation
    • https://kikokemez.weebly.com/uploads/1/3/5/3/135331375/4d50dc45250dbb8.pdfIn PDF document text
    • http://zonedelukekide.iblogger.org/cisco_ise_byod_configuration_guide.pdfIn PDF document text
    • http://jelesanu.iblogger.org/59935288998.pdfIn PDF document text
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/kemulazaxogowoxo.pdfIn PDF document text
    • https://noberewesuxo.weebly.com/uploads/1/3/1/3/131379636/gepunojax-rejuzifamo-fodorawa.pdfIn PDF document text
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/bojara.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/785119.pdfIn PDF document text
    • https://vojonabof.weebly.com/uploads/1/3/1/3/131383251/xijuv-vuvuriba-ligapajite-lenavibumaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9af74b3-27d7-4075-a853-36a6cfd636bc/governor_of_poker_2_apk_full_game.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/sibujixoxolojudiwijaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043c4a88-5941-4099-8996-7bfbcd332087/learn_hindi_words_through_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca9ebb9-3c65-48fb-9251-5bd9f889f8b5/samsung_un55js7000_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/zazivegusatuwa.pdfIn PDF document text
    • http://geralumumavol.rf.gd/contrato_de_arrendamiento_terreno_agricola_ecuador.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/ancyl_membership_application_form.pdfIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_5c111a51eeda4eb9b010bc63b507ef30.pdf?index=trueIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_530b7465bc654296b0f76195f7b68211.pdf?index=trueIn PDF document text
    • https://1f9cfe0c-d655-4514-b58a-75380282e405.filesusr.com/ugd/d31784_86d6655913a0487ba8b12ead34a10625.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad3f05d-6477-4f84-b135-bc4afd1ebb89/podewudofofawus.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_off0000d947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD947 5456 bytes
SHA-256: 9d774f7388cc422eaf97cd576731bc70c768247d8c9a87e0965694eff0e86267
font_01_sfnt_off0000ebbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBB 11052 bytes
SHA-256: 9eaaba147c5d716bbd185c53261c6b3648a208784fd3d27c48ea522767832e2b

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