Malicious PDF — malware analysis report

Static analysis result for SHA-256 885a52cd7f37daa1…

MALICIOUS

PDF

41.2 KB Created: 2020-10-08 13:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a845e8d0972eaef6de7920b0a73c7135 SHA-1: c31abc31bf85d9dfb9887bcdf30b610a6874a15a SHA-256: 885a52cd7f37daa15cf82c2d07166b4104471aa07c2d8ae7f2f604bca2e57151
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=2001+gmc+sonoma+repair+manual+pdf In PDF document text
    • http://files.reikibysharon.com/uploads/1/3/0/8/130813837/kaxokowilikoje.pdfIn PDF document text
    • http://fined.colleenscutecreations.com/uploads/1/3/2/8/132816202/befomobokijawev.pdfIn PDF document text
    • http://naxumaf.myyogajourney.co.uk/uploads/1/3/0/8/130873915/1667451.pdfIn PDF document text
    • http://nupovi.allendaleunionchapel.com/uploads/1/3/1/3/131384306/lazodenop-betuxivesemosax.pdfIn PDF document text
    • http://wovek.rampantoutdoor.com/uploads/1/3/2/6/132682787/vexabeke-gasow.pdfIn PDF document text
    • http://files.trivvy.nl/uploads/1/3/1/4/131437680/8789266.pdfIn PDF document text
    • http://seriwe.huffmansflowersofthefield.com/uploads/1/3/0/7/130739892/jopegutoro.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/1/0469/4612/3937/files/mutivazezipuzepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b62952-a7e8-4c80-92f9-2b3cc38edac5/86657432744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7abb6d16-1686-4996-846a-6ea2571f6c6b/lorozubunaxenufaj.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_off0000608c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608C 5708 bytes
SHA-256: f1f8ff01d49f99da4a3ab733519574c91577d76cc0cf220192d37428ed340407
font_01_sfnt_off000073e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 10604 bytes
SHA-256: c6a433eb188962c41c78431c706cd99133ef711065b920e2386af5e1b0da4c34