Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45d2a6d66081c54…

MALICIOUS

PDF

76.3 KB Created: 2021-01-22 05:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 588023fbea8bbc48ef4f626a1df70db1 SHA-1: 377eb04036b5ba0dc74f687cdb70a1cb575444d8 SHA-256: d45d2a6d66081c5421e80ba59b1c0534f456caa94bddf1e9ca43077742d1b008
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious document, including PDF_SEO_LINK_FARM and SE_ADVANCE_FEE_SCAM_LURE, suggesting it is part of a link farm designed to trick users into downloading further malicious content. The presence of embedded URLs and the ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, contains keywords related to bills of exchange and invoices, aligning with the advance-fee scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/123?utm_term=bills+of+exchange+act+canlii PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458615/normal_5fddd191b3d11.pdfIn PDF document text
    • https://jajufuwupu.weebly.com/uploads/1/3/1/1/131163717/wusubupefama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387819/normal_6008a4fd11417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474979/normal_5fc7e4b1cbfcc.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/xojafemori/renagewuzulerove.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/ccleaner_piriform.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/kimorekudob.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/guided_reading_text_and_questions_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/grade_9_mathematics_questions_and_answers_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/a_d_m_o_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/obusforme_300_massage_chair.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/lezefazafexafogifuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/bauhaus_font_mac.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 5164 bytes
SHA-256: ee6fddd804e72c42e197dab4cd5ed98f1572564a8fc346662b814b6cb1961ed8
font_01_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 11428 bytes
SHA-256: 5e950510008d4e2736d23cdfd6693633d1db3688e2a9556da42292e73ee58e6c

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