Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ab8f7837975046…

MALICIOUS

PDF

68.8 KB Created: 2020-11-25 02:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 875b24c3df4c88afd417fac5d0076797 SHA-1: c037c51ce35447b2ad7627f52bb94baaa192a1fa SHA-256: c3ab8f7837975046a29c3105927f9ab6c2cd9f895f5d4bb3f3f49485ffe50da0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is likely intended to lead the user to a phishing or malware download site. The document body, though heavily obfuscated, contains text suggesting a lure related to a "Whirlpool cabrio washer manual pdf". The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=whirlpool+cabrio+washer+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f87df2e223b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_5fa4b07991bc0.pdfIn PDF document text
    • https://xifepifedezuz.weebly.com/uploads/1/3/4/4/134495844/rejejabojolazorep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_5f95f48b23f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5faf930cec4fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_5fb920efa4cce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fb8811a62914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469863/normal_5fb70222ef278.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/14e357cb-5db8-41e1-9843-2b22956d5c67/55110053553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277f2d08-631e-4ac2-9005-f11ef83e4cdd/94606917503.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/arjun_patiala_habibi_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/jukujamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5d2ce4-a0a3-44a4-94f6-4392cc98fb9a/dukuwinokike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28418a5c-b0a7-4efe-aec2-fae19de80300/puxowewudelekalopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f5f64d-1afa-4508-8eb7-85a211e03d83/the_electric_banana_pittsburgh.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_off0000cfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE9 5640 bytes
SHA-256: f5ea3d22aaa5d3ec10f53a9c2c6470162c767d1157802f432fa8f385d24653f8
font_01_sfnt_off0000e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 10280 bytes
SHA-256: e462ad78c7a2fc9a0bec94c231280457a756b8871c478c98258ea07ae193d555

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