Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7aaa1510d13c8e7…

MALICIOUS

PDF

76.0 KB Created: 2020-11-18 08:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1f7e22cb15c7dbdc51ba3a2402fecfe SHA-1: d4c0718d0a652fa79b5c2de5b24efc504aebcee9 SHA-256: f7aaa1510d13c8e764e451400f31744deb4394c078ac3179f552e42804199b59
156 Risk Score

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 the primary external URLs is 'https://traffnew.ru/123?utm_term=all+of+the+following+are+part+of+the+middle+east+cultural+cluster+except'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or hosting malicious content. No scripts were extracted, but the structure suggests a malicious document delivered as an attachment.

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://traffnew.ru/123?utm_term=all+of+the+following+are+part+of+the+middle+east+cultural+cluster+except
    • https://cdn-cms.f-static.net/uploads/4450640/normal_5faae5a38b95b.pdf
    • https://cdn-cms.f-static.net/uploads/4401696/normal_5f91ba41ea9a7.pdf
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f9c1d58dda13.pdf
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5fa09940a33ad.pdf
    • https://fozafilamo.weebly.com/uploads/1/3/4/3/134314768/d0f07ad.pdf
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f98d1de0cf79.pdf
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/5943524.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/86840a92-3d06-47b2-99af-ef2dc3d40eed/dodge_caliber_srt4_for_sale_colorado.pdf
    • https://uploads.strikinglycdn.com/files/a48f5552-03cc-4c03-991e-7480c57c3edf/tulsa_honor_academy_tulsa_ok.pdf
    • https://s3.amazonaws.com/gezejoputiwinu/agrianual_download.pdf
    • https://uploads.strikinglycdn.com/files/e272ebb4-7acc-4c91-880a-3bf1124b1377/strategic_ambiguity_taiwan.pdf
    • https://uploads.strikinglycdn.com/files/8ae3625c-dff8-446d-adf9-7690f09bd7c0/40996032596.pdf
    • https://uploads.strikinglycdn.com/files/cf7b80bb-6312-4258-bfd1-0a2a4af7227b/dnd_5e_starting_equipment.pdf
    • https://uploads.strikinglycdn.com/files/e453b0ba-3f54-4a86-8b30-7599691b47dc/Celebrit_libere_upskirt.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_off0000ea63.bin
e98524fefc1ba86202f8132e44988dd76a3be8457c56ad11c34516945102f406		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 5716 bytes
font_01_sfnt_off0000fdcb.bin
afba23fcf7fb8d01c0bcef814fc7c1f4b8ec28abf3e2c70b74471638c3b73e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 11156 bytes

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