Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d5c178a6051a17…

MALICIOUS

PDF

65.7 KB Created: 2020-11-24 10:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a0d1fc988969a5944772b2b64d6036e4 SHA-1: c4561c39e48ceb6dc2b0f25f6fe7d680be90e820 SHA-256: f1d5c178a6051a178dfd9dcd23e0fa7c795e4dfcf15517867c8520e4faf6d3b3
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 ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. It contains numerous external links, with one prominent URL pointing to 'trafficel.ru', suggesting a phishing or redirection attempt. The presence of embedded PDF link farms further supports the malicious intent of distributing traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=blanchard+macroeconomia+una+prospettiva+europea PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449973/normal_5fbc831031f33.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/8444efb68af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452837/normal_5fba919946b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_5f9795961956d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412897/normal_5faacc6b0f88c.pdfIn PDF document text
    • https://fuduxudeki.weebly.com/uploads/1/3/4/6/134606049/4099421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5f95bd2042b4f.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/3ae4c889-51ac-4aa0-a37c-dce29cc5bff9/tagosutowunuxuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d29e58f-d68b-4d44-a8a7-22f98601c739/49868729577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa2e2ac-2507-4fe2-9f11-cf5344e70901/lemomovikoremujo.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/free_spanish_to_english_translation_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f96cf57-088f-4156-8417-1d61c52bc405/wood_machinist_tool_chest_hardware.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_off0000c434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC434 5424 bytes
SHA-256: 0175592fdde856b809debd4ba1eba8fe4fe56c4322482c2b02b602a5974d55db
font_01_sfnt_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 10264 bytes
SHA-256: 24c8f862bb625f13f761d81d26aa502ee5560c3221dba8a9ae5eeccc986dc410

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