Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5319793cb7ff89…

MALICIOUS

PDF

76.6 KB Created: 2021-05-06 05:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d49c46fd32a94426dd16dd165b14bb0 SHA-1: c4b488483bd988d41108740e706bbd638cb35cc3 SHA-256: 0e5319793cb7ff892f1953409cd2c8dd0ed1651d640c982addcf77fc30a439b6
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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=dungeons+and+dragons+5e+character+sheet+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472185/normal_6016fcae50a4a.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/xusimavonesafesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_603c34813a255.pdfIn PDF document text
    • http://kumaboperituf.22web.org/pabunu.pdfIn PDF document text
    • https://lozatovetifeg.weebly.com/uploads/1/3/3/9/133999134/6fb0d2fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_603995527ff9b.pdfIn PDF document text
    • https://pupuwovojetisig.weebly.com/uploads/1/3/1/4/131438468/2e6a9ea9df4.pdfIn PDF document text
    • http://lozomasazama.iblogger.org/taurus_pt111_g2_9mm_width.pdfIn PDF document text
    • http://pukutabutosu.22web.org/jawikirofij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_60534c6ee687d.pdfIn PDF document text
    • https://resodapiperuxa.weebly.com/uploads/1/3/1/4/131407292/98b9d4d4377e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_6052dbfca08c6.pdfIn PDF document text
    • https://genopajixon.weebly.com/uploads/1/3/1/4/131452954/4229435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_60622d7da6ea2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mivurekas.epizy.com/36725999740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56292489-4009-4313-b9b3-d89006ea9b9e/how_to_reset_dlink_dir_825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d6b7d9-b40a-4835-859d-ef0050029eaf/fearon_rationalist_explanations_for_war_critique.pdfIn PDF document text
    • http://wamowif.rf.gd/sultans_of_swing_bass_sheet_music.pdfIn PDF document text
    • http://tavagebobuzopin.epizy.com/lomebup.pdfIn PDF document text
    • http://fixojaxid.rf.gd/system_design_tools.pdfIn PDF document text
    • http://nixonijokafov.rf.gd/rijikegim.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_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 5416 bytes
SHA-256: 54780b063491b15e7fbcd87ca407e3afb473f0c8eab79b7a035859e1dbb49c4f
font_01_sfnt_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 11104 bytes
SHA-256: c8b4f7ab7e71b7f46c9192ea63d321f6277414d759791d5c7d4977e3606f42e2

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