Malicious PDF — malware analysis report

Static analysis result for SHA-256 619b71a79c56a695…

MALICIOUS

PDF

78.5 KB Created: 2020-12-16 01:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e4df1793e323a9ad33968640ae03c02e SHA-1: b74beae10213c12e6f42337e425e7f5d3154c9c0 SHA-256: 619b71a79c56a695782ae2db17943ab4240a918c924b100980669fd5301a184a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=holy+aura+pathfinder PDF link annotation
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/tizedeniluxiz-gefowigujotubu-senunomikale.pdfIn PDF document text
    • https://wajativakol.weebly.com/uploads/1/3/4/7/134749030/8520466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_5fa8bba3b01c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fa91d0f5558d.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/berapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f941f5e50bdc.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/modoxuduro_gubixi.pdfIn PDF document text
    • https://koxubabu.weebly.com/uploads/1/3/4/3/134314291/ludurizadel.pdfIn PDF document text
    • https://saboruxeketeg.weebly.com/uploads/1/3/4/8/134850947/digis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5fb43543e3e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f8a6c41570cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf548f9b1ed03538d1e585/1606374544008/ziluxokizaxogawadadomi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6afd77848ba205d414585/t/5fd17bbab1f69267714de3de/1607564219289/potbelly_sandwich_shop_chicago_il_60642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d983932a-eaab-4753-962b-402dd705e1b6/black_eyed_peas_instant_pot_indian_recipe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fcc1dcf1e1a4d7de119d8a7/1607212496347/doxawomujedixosarurobifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363f4b1e-dfb9-4418-a0a0-90d0462337f2/18103065153.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7862a2122570d5802ac5c/t/5fccb382a87f9f1b19d57b34/1607250818857/home_assistant_raspberry_pi.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_off0000f572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF572 5016 bytes
SHA-256: 3ac2ef7ed8ae2568dc79753b87bd88ff3baf1525698a9dca01b07a90cd82fabb
font_01_sfnt_off00010685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 11448 bytes
SHA-256: c2df34104dbc641ce79cf0c2e53e4b762fca0c45a0bd25a256d90070f1541872

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