Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6104d0473a9a69…

MALICIOUS

PDF

35.4 KB Created: 2020-10-02 04:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a635e727b1ad503a5943dd5e2b64c33c SHA-1: 72dfabb340eceff067bcc87c6b3b11f5ed838cc9 SHA-256: fc6104d0473a9a697f748a0f63957ef45a3d7650ec2fc7e6325330838b21cf12
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=english+test+level+b1+pdf In PDF document text
    • http://files.themadshutter.com/uploads/1/3/0/7/130775784/zafudezomoroka.pdfIn PDF document text
    • http://lazonalav.bextraordinaire.com/uploads/1/3/1/6/131636725/d238b5287466fe.pdfIn PDF document text
    • http://files.genewildest.com/uploads/1/3/1/6/131636903/2597369.pdfIn PDF document text
    • http://files.curetypeone.com/uploads/1/3/1/3/131380121/dadf492e7ec13e.pdfIn PDF document text
    • http://vibip.warrenchapelumccommerce.org/uploads/1/3/2/6/132695584/9b6d3fc632a85.pdfIn PDF document text
    • http://files.vinified.co.uk/uploads/1/3/2/8/132815019/bunusot_wanoruforetowi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9504/6811/files/pick_3_evening_pretest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5030/2616/files/keslerscience.com_2016_crossword_puzzle_answers_energy_transformations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6442/2300/files/94827511399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/suzawebasevabasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a818e067-cd74-4ab4-bb85-8b653c67bdbe/jejimivezokukudanilag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becc5ec7-d0dd-425d-a484-a76366ceaceb/68441326714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201bcf90-3baf-4aa8-9d45-aa254666a498/40408862296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0c6712-f6fe-4d4e-a852-344dcdf6e288/85588101770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2b2899-37cf-432c-9bf8-6009339e00c0/60917092287.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F60 5208 bytes
SHA-256: 80a9be5da7855a06ee8e649455043c73a2358cda2daedfee51d8e27b42ea9910
font_01_sfnt_off00006126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 9204 bytes
SHA-256: b40c8980ec10950a9a7e459c9064bc6e9034ff01f964d24d1d33649503330393

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