Malicious PDF — malware analysis report

Static analysis result for SHA-256 067a4fa6a4b8be69…

MALICIOUS

PDF

71.3 KB Created: 2021-03-09 13:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4e30b780a9393dce29a47668a45fa66d SHA-1: b4df5765802895bb360316302caca3c7ca7ef6fd SHA-256: 067a4fa6a4b8be69941cd09a2c7002e67725b44bb3d1eb44fba169026ec82056
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/award?keyword=anthem+bcbs+ga+prior+authorization+form+pdf PDF link annotation
    • https://cdn.sqhk.co/tezejikibus/6hjhjhg/online_general_knowledge_quizzes_uk.pdfIn PDF document text
    • https://bodokevusigow.weebly.com/uploads/1/3/2/7/132740435/darujeg.pdfIn PDF document text
    • https://turarizamagux.weebly.com/uploads/1/3/1/4/131453837/botejajawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_5fd719fc480b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407057/normal_5fe6f7926ab79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_600c8a2821c3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423728/normal_5ff7663ba235d.pdfIn PDF document text
    • https://cdn.sqhk.co/xapixigu/gewjhif/wixivurowesasosixinap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5ff03a240dbe6.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/zezolatutumupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422906/normal_6031b6811981b.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/gigA7HJ/rotator_cuff_exercises_nhs.pdfIn PDF document text
    • https://tudadakamoziv.weebly.com/uploads/1/3/4/5/134596668/82dfc1468c.pdfIn PDF document text
    • https://soxiwavarado.weebly.com/uploads/1/3/1/4/131437421/mewevek.pdfIn PDF document text
    • https://cdn.sqhk.co/fidapulano/hbjfjiA/polumuwizadi.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/apADggE/7625475380.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/5411dbce-be3c-4570-8ce0-5c2ca42f7390/best_diet_plan_for_healthy_body.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13605b03-a52d-47e0-abc1-ab06579ea6f0/toastmasters_easy_speak_harrogate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a1161a-c8ab-49e5-8162-0463e7ce4e4a/45549245049.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_off0000d91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91E 5716 bytes
SHA-256: 1dfc6d3cc83822b9aeb8a391d8d4480e9c936fec5981611e31f4a8dc53752b30
font_01_sfnt_off0000ec71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC71 10344 bytes
SHA-256: 88cdc3b5ec047c3bf5a338e2983fcb5fea59c79b374521cf233a79f308f90c2f

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