Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fa12a1dc48314d…

MALICIOUS

PDF

74.8 KB Created: 2021-02-20 07:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: de6e96f3e50e921799345a5d8778dd4a SHA-1: 37483e5214118e9a323b5da9743ae92efdf74aba SHA-256: c3fa12a1dc48314d33b0e6f103fcf1035a8127eb776429d9ef3d37df4d22a0be
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a phishing site, disguised as interview preparation material. The PDF structure also indicates potential for exploitation, though no specific script was extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=how+to+prepare+for+interview+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/dalegoti/gghfg8J/tojifilekujojulibugat.pdfIn PDF document text
    • http://zarabatyivat.ru/laxebilip1y4xb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383308/normal_5fded4b949650.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/SZsfhjL/dc_cupcakes_recipes_vanilla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_600df75a81547.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/lWe5ijP/65084526952.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411498/normal_5fcdc8f1f41ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fcc494425bdf.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogivotosu/4ijgfKt/74743190509.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://s3.amazonaws.com/dagasopones/24613165864.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/numbers_in_english_1_to_1000.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/baal_veer_1053.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/platform_bed_canada_ikea.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/67240245105.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/8139660346.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/73032071949.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_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 5124 bytes
SHA-256: fe56a36df59905aa45fc9f306011e17ff94ee28eeca538f4ae58054bedbf271f
font_01_sfnt_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 10032 bytes
SHA-256: 522feb90ba132eaee32d56a9b562c900b447bbb353c96c5972a020f060ccb12e
font_02_sfnt_off00010fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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