Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bd1f063671c218…

MALICIOUS

PDF

39.3 KB Created: 2020-10-05 21:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 19e8ef47b9cf228ebba8534ea4520056 SHA-1: e9911621c582fa42f9de11cf4cf06b6c4f132d22 SHA-256: c2bd1f063671c218b9081f3150c6093b2a11445efbc0c79bb81a44ae6c30885f
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://ttraff.club/pify?keyword=simplygo+oxygen+manual In PDF document text
    • http://files.tccbioscience.org/uploads/1/3/0/9/130969937/2742363.pdfIn PDF document text
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.pdfIn PDF document text
    • http://tupexaf.thedecluttermother.ca/uploads/1/3/0/8/130874253/4995543.pdfIn PDF document text
    • https://site-1037906.mozfiles.com/files/1037906/17752087614.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/fiboji.pdfIn PDF document text
    • http://files.liupirogi.net/uploads/1/3/1/8/131871569/6556532.pdfIn PDF document text
    • http://ripovud.timsguitar.net/uploads/1/3/1/3/131378898/gamus-sedexopusomuzap.pdfIn PDF document text
    • http://files.ruggyd.us/uploads/1/3/0/7/130740530/9035e542d.pdfIn PDF document text
    • http://files.vagueandvaliant.com/uploads/1/3/1/3/131398515/412f755e.pdfIn PDF document text
    • http://files.momentumsportpsych.com/uploads/1/3/1/6/131636625/jujitelosivi_molukigobam_forewotololil_kevigo.pdfIn PDF document text
    • http://files.keepeducationpublic.org/uploads/1/3/1/4/131454065/vogibenugesuj.pdfIn PDF document text
    • http://sijotexun.graceforthebroken.org/uploads/1/3/2/6/132695780/vexemawepogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 5136 bytes
SHA-256: 6622854ca1bbdda689c92f8e88c39360d4704d33857a62d2edfb71fb4fd7b723
font_01_sfnt_off00006f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F41 9880 bytes
SHA-256: 524cc7a23d2a7f5837443e322c1c0e7c4a1c01b1c9b78acc3cb17cc66c7a19e8