Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4ded47ea3cbcb0…

MALICIOUS

PDF

78.4 KB Created: 2021-03-03 02:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9b29b660d69db10d1ff9c440e8e150e9 SHA-1: bb871633b1461328ed712e1be0db8132da560f5f SHA-256: 4d4ded47ea3cbcb0b8dcf32bb35c6dd85e1a3ea380a035fff9f6cc0d164c1e3c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF being identified as a phishing trojan. The embedded URLs are likely used to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://xezojetit.ru/123?utm_term=final+fantasy+7+original+ending+explained PDF link annotation
    • https://paxupodef.weebly.com/uploads/1/3/4/7/134763896/kitigekejiposidamogi.pdfIn PDF document text
    • https://taxesewisozigif.weebly.com/uploads/1/3/5/3/135394589/f41e56815705e.pdfIn PDF document text
    • https://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/293781.pdfIn PDF document text
    • https://kukaweferoba.weebly.com/uploads/1/3/4/7/134754127/fifetusemigodop.pdfIn PDF document text
    • https://bodijoso.weebly.com/uploads/1/3/1/3/131380183/pupikimeneriwone.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/ajgNt0N/fonts_keyboard_apk_download.pdfIn PDF document text
    • https://xirofagoxo.weebly.com/uploads/1/3/4/5/134576207/nodebabofonipet-borema-lepugidozeze-nijubiwudinegad.pdfIn PDF document text
    • https://gopoxigubujazu.weebly.com/uploads/1/3/0/9/130969754/cf8bd96.pdfIn PDF document text
    • https://votebefi.weebly.com/uploads/1/3/4/7/134715150/f34c6b27e.pdfIn PDF document text
    • https://marevesebogu.weebly.com/uploads/1/3/0/8/130813877/50712f037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vokeri/jzyk_angielski_dla_pocztkujcych_dobrzycka.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/abb_surge_arrester.pdfIn PDF document text
    • http://gadusevi.rf.gd/anyway_you_can_annette_bosworth.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_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 5412 bytes
SHA-256: cf8879615b0b047a474374eb5abd21895d65f9de38f015eee86a274b52d0f5cf
font_01_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 10836 bytes
SHA-256: 21f2bd5cdd0e9594dc9e559689fdd60a3bcec02bb2cf7f7d6fe16862cba8d0e1

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