Malicious PDF — malware analysis report

Static analysis result for SHA-256 c077f16d593d4136…

MALICIOUS

PDF

90.4 KB Created: 2021-05-30 03:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 731040fde4811e7f28def10d788370ad SHA-1: b823a827502d02cc1a59cb77bd744dff6f83fa92 SHA-256: c077f16d593d413628b613feb3c0eeb370a87a61dba922ca2c29186775f7850f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both heuristics and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of the 'utm_term' parameter in one of the URLs indicates a potential tracking or redirection mechanism. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=configurar+controle+remoto+tv+samsung PDF link annotation
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/3584243.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/c3446bd.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/46923dbbf30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452400/normal_602ce84657f9b.pdfIn PDF document text
    • https://bogilerilixami.weebly.com/uploads/1/3/5/3/135345361/sinolure_bifozomoli_tewepewun_zemojefunun.pdfIn PDF document text
    • https://kinamolifurepe.weebly.com/uploads/1/3/2/7/132710726/9095571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_606b758455581.pdfIn PDF document text
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/387323.pdfIn PDF document text
    • https://tosofeguwus.weebly.com/uploads/1/3/4/3/134321705/ravotabotegup-wovuz-pibugolul-lowuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_5fef01e1559b9.pdfIn PDF document text
    • https://vatewiwep.weebly.com/uploads/1/3/4/4/134482367/94267336.pdfIn PDF document text
    • https://litaduzava.weebly.com/uploads/1/3/4/4/134499200/2372625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501634/normal_6050040324385.pdfIn PDF document text
    • https://togasiwivote.weebly.com/uploads/1/3/4/3/134370981/jalevun_nifepeke_vuvife_guvoradoxepe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490929/normal_6007b59383576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe1535f087db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/db7c4161-5556-4714-a06b-6b67e1ed9cf9/savewaresetezaguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b52bee8-8c1e-4ee1-b72d-e53b09ee9473/xapedeviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed83899-f22b-495e-a216-469fb4c726bc/what_should_i_write_in_my_performance_appraisal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 5168 bytes
SHA-256: b8e9ba5ba8701cb3acaa4964631fdf7d68a21639dc4f892ec2a39646b5ea3531
font_01_sfnt_off00012546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 12652 bytes
SHA-256: ea5d3ccf9a10d117643cbaaadc2d5afddce1ec9e21577221218e08c423c03619
font_02_sfnt_off00014c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c