Malicious PDF — malware analysis report

Static analysis result for SHA-256 c222354a3465139c…

MALICIOUS

PDF

78.2 KB Created: 2021-03-11 12:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 46000dfd5f8a89c7fdd4d2ea69aae91f SHA-1: 5422668e88ede5bfbfa80f0c2e4075a2a0f1d04d SHA-256: c222354a3465139cae23de3211cd4433fe833af23a23363da0a06d3f6807ae89
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to a link farm on disposable hosting, reinforcing the malicious intent.

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://bologen.ru/strik?utm_term=how+to+connect+arctis+5+to+xbox+one PDF link annotation
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/6535352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_602d703cc8b76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410186/normal_5fc57c37efea9.pdfIn PDF document text
    • http://wersita.space/principios_de_auditoriasjki8.pdfIn PDF document text
    • https://desujerobum.weebly.com/uploads/1/3/1/0/131070458/simipupijibad-kabinojarurojas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_60066f2bba262.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/fuxighc/galaxy_wars_classic_space_shooter_hack.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/6064139.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/hdtiis3/47923549363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_602e9a3f4c55a.pdfIn PDF document text
    • https://relulime.weebly.com/uploads/1/3/4/3/134384492/9334954.pdfIn PDF document text
    • http://genusadnlo.space/4269412488mcqcx.pdfIn PDF document text
    • http://astropsychology.website/8951718130256geh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_601c8d22e2a19.pdfIn PDF document text
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/davefo_dukejovi.pdfIn PDF document text
    • http://citrus-fruit.space/iron_883_service_manualwdexl.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/rodiligarexo/weekly_calendar_template_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/zupisevitovu.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_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 5148 bytes
SHA-256: 386baede0bccb0f6ea201cd0a7b16cb2475fd623982d29147e9619a5d1e3ef89
font_01_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 2132 bytes
SHA-256: 1876e79ed574fb52b736e4f67d1ddb3f54ccd8689875b9fa289c5107488bc5f9
font_02_sfnt_off0001071b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 10536 bytes
SHA-256: 819b1baa9bdc54ca3c7139f644fdc7b002abd58b6f411cb76988d4768e2de3d6

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