Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d89c995e13b710…

MALICIOUS

PDF

77.9 KB Created: 2020-12-23 20:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70b39872f5624091dc15e8c39e2d9743 SHA-1: db9df06067beefc5841212462b849937ae8835c0 SHA-256: a7d89c995e13b7105f021e764d566a7bc203997ac33614d5828002c5d6dcc904
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm and ML classification indicating maliciousness. It contains numerous external links, with one prominent URL pointing to 'traffine.ru'. The presence of a link farm suggests an attempt to manipulate search engine results or direct users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=how+to+upgrade+idle+heroes+top+10+star
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/2963064.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c071eb49-cd41-4ebf-a84f-c2769eeff081/zannis_plastic_surgery.pdf
    • https://uploads.strikinglycdn.com/files/1c6a5fb8-afa0-41b5-99e7-9c6fe59e83d2/white_wall_motorcycle_tires_canada.pdf
    • https://uploads.strikinglycdn.com/files/2b4f9b1e-13a5-4de3-9832-ed8d72d293d1/64516617956.pdf
    • https://uploads.strikinglycdn.com/files/f017d75a-a646-4cc1-bb2b-1f4ca8fc2357/nuvezokowilopiletusaw.pdf
    • https://uploads.strikinglycdn.com/files/08e1f9ec-3423-481b-b320-820e6c8f636e/lasub.pdf
    • https://uploads.strikinglycdn.com/files/9a77be5f-b854-439a-b89d-e234cbf56165/nogogepulajubopuruz.pdf
    • https://uploads.strikinglycdn.com/files/0496b0b5-abd1-4ecd-88d0-b07bf57bae6e/rogunutujemu.pdf
    • https://uploads.strikinglycdn.com/files/20729542-d139-4691-8080-f783bce05bdd/2007_suzuki_burgman_400_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/2727170f-836e-4b03-8e32-1065fe2c8f32/buenas_noches_poema_para_mi_novia.pdf
    • https://uploads.strikinglycdn.com/files/aabcc00b-0640-4793-89bb-4ec908ba1562/18615771616.pdf
    • https://uploads.strikinglycdn.com/files/841a7f35-0def-4c72-bdfb-03d0afc2691d/89817240192.pdf
    • https://uploads.strikinglycdn.com/files/7f9e7f09-d0ad-4ef2-a0f8-6e47829d2c64/tp-link_tl-wr703n_specs.pdf
    • https://uploads.strikinglycdn.com/files/821cffa5-288a-46f3-832f-2ceb8a003cd3/79009642553.pdf
    • https://uploads.strikinglycdn.com/files/b9059efb-a11c-4a92-99a8-4cfcbc87833d/89569372640.pdf
    • https://s3.amazonaws.com/subud/83425650034.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f9.bin
17003d1b8dfaa9561ec84607fbfde3414fa54ff5744b88b9456dbee91d7d1894		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 5468 bytes
font_01_sfnt_off000105a0.bin
f2d8cf0f6dab8e9e27bbe89c065ee77d16ac04a175cd885567f8e67db5a7bad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 10824 bytes

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