Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3004dfd4b8502f5…

MALICIOUS

PDF

76.0 KB Created: 2020-12-26 15:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: db63edd38123da91119e8b0301fabe0f SHA-1: 4ad678b8d39f5b704aeb4ca137846ac2a4766e00 SHA-256: f3004dfd4b8502f56bead7002d484b58d7c130ebb3bbb5d42c8094ea88dfffe8
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 ClamAV detection as a phishing trojan. The document contains numerous external links, with the primary suspicious URL being https://trafffi.ru/strik?utm_term=super+save+gas+propane+tanks. The presence of a large number of external links suggests an attempt to direct users to potentially malicious content or phishing sites, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=super+save+gas+propane+tanks PDF link annotation
    • https://cdn.sqhk.co/tokititagiwe/TlXMkyr/call_of_duty_warzone_zombies.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/miwolanu.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/3882923.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/vekuzubejijavu.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/widofafane/athens_airport_terminal_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ddf78c-0c32-4484-9e85-5769ebb6ed42/zeguzawodojek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75b80d9-4026-428e-a0bd-bf36025e4734/58519241743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23ebfe0-7db1-4bb8-8efa-7a5ea6a32a58/miziporubokumufa.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/analytical_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/graphs_of_parabolas_vertex_form_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/animals_song_320kbps_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/world_chess_championship_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215932b2-afa4-4073-855f-39d7d700e380/ap_us_history_summer_assignment_2020-21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bf04d8-bf74-400d-a2b3-741fd6ac591a/life_is_strange_2_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/14915672010.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_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 5180 bytes
SHA-256: 799ff921aed2ca332da8ad05be20d70da7b3abfbcb98e10f1be9c023957ea03b
font_01_sfnt_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 11036 bytes
SHA-256: 62475697cb7f0aa30a0d84213dc8dddfcf630d09fe536c82ac3fef6886356c6f

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