Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fee066074b4714…

MALICIOUS

PDF

80.3 KB Created: 2020-11-11 00:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c2b030a977a6c3856e72934a455d74ee SHA-1: 9739eee26c7dfe738beb66c5453ae5d0db6a0486 SHA-256: a6fee066074b4714dc6221043c10a54393e32ba4d12c754057e6c8a112f97b50
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://trafftec.ru/aws?keyword=doxen+mixed+with+cocker+spaniel', suggests a potential phishing or content manipulation motive. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing document designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://trafftec.ru/aws?keyword=doxen+mixed+with+cocker+spaniel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f90c80b3fb4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f973ea98eec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f8a2f7cd4ce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5f9ccf105dc49.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/rilik-guwuj-rexosigevipu-mobukumerus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f87553559a7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokit/memijebekuponol.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/what_does_interpret_mean_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/44833630090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a10d8a7-2187-44c6-a72f-a37fa7e7bf1b/jokutafefigotirosatop.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/robewozufubiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8825162-4eb3-4e93-a533-06bf8c4d87aa/gagawog.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
    • 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_off0000c5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AF 5536 bytes
SHA-256: 736d0601735bf0f8a77bb37c503cac2e70d8c75eb10b8c11596068668fc8473e
font_01_sfnt_off0000d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 8156 bytes
SHA-256: aadaa216a1c100d33031a5c178a0a38acddc0500054f167eb7b0cb46ea469948
font_02_sfnt_off0000f31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 9984 bytes
SHA-256: 2a11728935776372dbdfc0064bd066e547fe9c9ce2371351c4f6cdc16b307d6f
font_03_sfnt_off0001158b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158B 16512 bytes
SHA-256: bfdbd38ced932a2f05e233d5cce3759bb684425472b8ccc15791e78f09f22acf
font_04_sfnt_off00012b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8C 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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