Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd46d3976e609fbf…

MALICIOUS

PDF

91.6 KB Created: 2021-03-09 14:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 22a35292df37b6420cf801aec2693719 SHA-1: a8a59e14b7ec42255aceeb7ed4834feed8a9cf02 SHA-256: bd46d3976e609fbf7412ae0d35619b9b09ca5d5d01374709d00e639487b4c2f5
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://leonvi.ru/award?keyword=comment+faire+la+grande+ablution+en+islam+pdf PDF link annotation
    • https://gagodizuw.weebly.com/uploads/1/3/5/9/135965264/885e95d62f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_6035d6ece4baf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366958/normal_5ffd4a644fd45.pdfIn PDF document text
    • https://remofixar.weebly.com/uploads/1/3/0/7/130776049/5853071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_602b731da94f1.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/genatifegonusu_lozojezigiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_6021f236ae700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490917/normal_604141f2952e7.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/roranerusonus.pdfIn PDF document text
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/xupijuxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457006/normal_5fe36840dca33.pdfIn PDF document text
    • https://nupepapeziwib.weebly.com/uploads/1/3/5/3/135319604/gejabimewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406241/normal_603e9f9190292.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/5dce15b0f63.pdfIn PDF document text
    • https://wixilasiniwib.weebly.com/uploads/1/3/1/1/131163505/lupasikanuxop-buzif-ziwobenaribov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_5fcefe37e3e61.pdfIn PDF document text
    • https://dibozavo.weebly.com/uploads/1/3/4/5/134501923/18e41407.pdfIn PDF document text
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/853a6a40374.pdfIn PDF document text
    • https://xuxijirabof.weebly.com/uploads/1/3/1/4/131406659/kasuvojuz.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://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_ffc46d888c4e4f71853b8c8cb28a2a3b.pdf?index=trueIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_d88b9fc160e24effba31277549a1ea42.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_ebf179bf748e4c68878f078d446f964e.pdf?index=trueIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_8575f08f77df4e2bb47076ab51ef0b0c.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 3248 bytes
SHA-256: 3f0b06b8e1528a8d3e39ebfca8046874df8693805c0dceb4b8914645b2db3872
font_01_sfnt_off0000fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD55 5404 bytes
SHA-256: 9f7597bb46625e188ba00ca63d20e721b4fbedf031d44da6094fad61136719eb
font_02_sfnt_off00010f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F92 12548 bytes
SHA-256: 92ae8ac129afe845a2b9d32f4847d6175022cebe1acff3558e2734aa1c2d3bc6
font_03_sfnt_off00013733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13733 17016 bytes
SHA-256: 6dd4ebbca067c9b0899ec0a5c6cc9b24b60c08bcaefa4206208893ed2c13453a
font_04_sfnt_off00014fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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