Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6a4b09d13e923d…

MALICIOUS

PDF

69.0 KB Created: 2021-06-10 06:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5cf7b59449c9505e96a56beb98829799 SHA-1: 03d475a9d11cbbb6d5f7c56b57124cd2f91b25b3 SHA-256: 3f6a4b09d13e923da5880b787b357620e5b24d75aced2ee21cad8f054beba68f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, a common tactic for phishing or SEO spam campaigns. While no scripts were explicitly extracted, the presence of numerous embedded URIs suggests the document's primary function is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://garglob.ru/pbw?utm_term=ps3+lego+jurassic+world+cheat+codes PDF link annotation
    • https://mejuxubewa.weebly.com/uploads/1/3/4/0/134041058/tokonadowapa-xufej-soxamor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_6025c7c808bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_5fe8aae80e30c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4499958/normal_60b268d3a07bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490735/normal_606e9e7c08ec5.pdfIn PDF document text
    • https://nowigusoludi.weebly.com/uploads/1/3/4/2/134266380/1e476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_6023fc993ccf7.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/c7c1bdbb-a045-4dcc-bdc0-920095bf8ac3/best_international_mail_forwarding_service.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/w/file/fetch/144459903/53459759096.pdfIn PDF document text
    • http://raxonepem.pbworks.com/w/file/fetch/144755085/19376691438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d827a7-6f86-4f90-af87-8a26ef6ce207/describing_plant_leaves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5198c485-1881-4460-9bb9-55b7a0c021e0/how_to_calculate_half_life_of_a_drug_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b535487e-25c4-4f24-a968-dfb9ae742f68/shakedown_hawaii_ps_vita_gameplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e545c3-da4b-4241-9735-fcbbd969cd48/nafumimegeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a877ea-a0e4-4f52-bf59-64cae281b285/2021569815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19eb0d92-ad06-456c-aaec-97a4653933ad/sutogiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79c7ed1-d7b4-4d22-8598-f4acc318edf5/59780270573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1036ed66-e15c-4162-a725-8af331a03ce8/list_of_integral_trigonometric_identities.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_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 5532 bytes
SHA-256: 757c06aa1326d691944df3192d36b5655eacceaf11202bbb15811795bf59755e
font_01_sfnt_off0000e1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AD 11576 bytes
SHA-256: 9fe5f562c34ab7f8f00a6d43fe5b9036c392da27fa2c503fe8f8b8c3a1c22113

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