Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95fba3a9725b01e…

MALICIOUS

PDF

70.1 KB Created: 2021-01-10 01:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d4f530a7fdd34480d5b12132a3227e9f SHA-1: 3d933af5156dbf046d879cf7c2d0c3fd170847f1 SHA-256: b95fba3a9725b01e3b47df3a47d9f93400c7f359fe9219972804de4fb6bea427
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it is part of a link farm designed to redirect users to malicious sites. The document body, though obfuscated, appears to be a lure related to interview questions, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffking.ru/aws?utm_term=critical+thinking+questions+and+answers+for+interview PDF link annotation
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/libawifelokuf-kebes-kowufuvorujisez-mifada.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/hbdhi5f/54079523713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5fc25fa3cf7b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5fa9ba0f24445.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/gjhdDpD/3883828197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5fa2789941330.pdfIn PDF document text
    • https://zaderoxuk.weebly.com/uploads/1/3/4/6/134694825/kidulonukuj-xibir-juratelivanev-zepebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474722/normal_5fa695e0a3ead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f999b2b200ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472206/normal_5fa7e98a2a517.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/bokexizometun/aha_2018_guidelines_cholesterol.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_off0000d6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D4 5532 bytes
SHA-256: 80090f3b1d39772a071696e7d7b6e823c1c1b851fa48873f84b03d3b73b88bad
font_01_sfnt_off0000e9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 9880 bytes
SHA-256: 4afa5197a891df25f4c3c9d2074a011c9c72c1e15991ccc58eb53d7e502f9d72

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