Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55c2596c4a776e1…

MALICIOUS

PDF

71.6 KB Created: 2021-02-25 10:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b4c48389c2cb2025032da0dfd8dffdf1 SHA-1: 40e1a68a63a2268c7717be259c9d113fb00b3f6b SHA-256: c55c2596c4a776e16c0a2e464128db1071aca4473543933e83046030db4f58a4
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/award?keyword=2003+ford+focus+ztw+wagon+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366377/normal_6014716cec1d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_60164348f3fbd.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/jcjhSgd/facebook_local_app_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5fda1682afa6c.pdfIn PDF document text
    • http://baykamif.space/zozizedudutidileugdrd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472775/normal_5fffb46038995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_5fe96fd503ac0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fe083dca4ac2.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/4642284820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_60220f840760d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495391/normal_5ffa6a4f0c888.pdfIn PDF document text
    • http://brumbum2.xyz/vugibaxajenamotewnnna1.pdfIn PDF document text
    • http://demask.fun/xutonetexogevolegupazelxhcif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://modunatotuw.epizy.com/nuruwikol.pdfIn PDF document text
    • http://nadedafusefemej.rf.gd/80034204714.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_off0000cb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB82 5676 bytes
SHA-256: aad349d41455712632dadb51eaa5ab6909ab8cf5bb951ffdb18afee36147534b
font_01_sfnt_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 15544 bytes
SHA-256: ebf7f6c6c49299771b3551262d163176ac24c608a506cf9b29d952a823db856e