Malicious PDF — malware analysis report

Static analysis result for SHA-256 1250a8ab098ef081…

MALICIOUS

PDF

73.1 KB Created: 2021-06-11 12:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0e77c36920de1bf8f13f584abd94a86d SHA-1: 5bd0c8b657f1cbb3d77e7313cc8b9811b2faed47 SHA-256: 1250a8ab098ef081a2b18c270b399b135f6b1ffd3b907cf3717a9420aa5173df
126 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 ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The file contains numerous embedded URLs, many pointing to disposable hosting, and is described as a link farm. The primary URL, https://crewmak.ru/pbw?utm_term=truck+simulator+offroad+2+mod+apk, suggests a lure related to software mods, likely to entice users to click through to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/pbw?utm_term=truck+simulator+offroad+2+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419637/normal_5fdb2d96d9eda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_6006ba557fbcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485695/normal_5ff4b7632671c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_605bc6e875a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fd328bbc6894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_5fdf7159a3221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5ffe8588c26c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485309/normal_601b4ac3a82ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_602110c043bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_606c56cc985a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_606214b30539e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa3c115-9692-4957-ad17-1af98f48e99b/fevenuf.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/f/reluvapuxijoxuna.pdfIn PDF document text
    • http://jaraduv.pbworks.com/w/file/fetch/145123701/relative_clauses_prepositions_exercises.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/w/file/fetch/144512139/wuvexevififidodasobaxux.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144655587/gaxifakawabarejuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971cef4e-64d1-4d01-b2d1-e03ded562b06/vemiketuj.pdfIn PDF document text
    • http://zuxanoguk.pbworks.com/f/synastry_reading_free_online.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_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 5444 bytes
SHA-256: 4e81bda6b7e9581e890022bbe27556025190c39ee77988c014781727fd56c398
font_01_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 10592 bytes
SHA-256: 9876909489df564080a2428e11ad6f9895009432e4084a6c16bc756a43f21664

Open this report in the interactive analyzer, or submit your own file for analysis.