Malicious PDF — malware analysis report

Static analysis result for SHA-256 476ed613fb9d9525…

MALICIOUS

PDF

84.2 KB Created: 2021-05-30 17:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e0560c0a1b79fd6c295bfeaddfc6c3c2 SHA-1: 5e1677420b3b3b7d731fe5d6937b2e939b2651ea SHA-256: 476ed613fb9d95252272e4526f2f21851f5a72f7c09603c8990a5383557d99c8
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URLs are likely used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jumiwimov.ru/strik?utm_term=raising+rank+insignia+mod+2.8.2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416512/normal_5ffa887ce6d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_604d2d7d25e8e.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/jefezasut.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/vibugajadel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_6038d3697f29c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_60162f18b1f58.pdfIn PDF document text
    • https://famojiwogupoj.weebly.com/uploads/1/3/2/3/132303340/006ba7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447915/normal_5feb02c27adcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_603bafab62cdc.pdfIn PDF document text
    • https://vofovolovun.weebly.com/uploads/1/3/1/4/131483423/f9ce23df4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5fed4e9bad21b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_602b4d0f14c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_60209801c776c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_601e09ad21926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_601718a67db2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370525/normal_5fcef5b519078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c55cc276-ff3d-447a-b5ff-22c2efe33959/2696957076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ed014d-0ac2-40d4-b740-215bad76e28d/how_to_look_up_sex_offenders_in_illinois.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87cf248-5012-452b-b0cd-2563a3ceb945/dafomuxuduvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd1e93e2-826a-481c-8fba-abda9e23a6ee/muvatuketuzixasudep.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 4172 bytes
SHA-256: c6ebe821bb875bf4b2129a16fa14cf2b9068b7991b21864b302d592c1aa61fba
font_01_sfnt_off0000fd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 5132 bytes
SHA-256: d3de52748b7a8040986fc0e8e4df95b52a05e7ce21024641de5c7b5fcf765031
font_02_sfnt_off00010ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC0 11200 bytes
SHA-256: 48c3b6b883ffc1c304c65a898fb410eed5eb53baaa3b9c481fefede8ead3ca64
font_03_sfnt_off00013520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13520 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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