Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a69013c53149653…

MALICIOUS

PDF

72.0 KB Created: 2021-03-06 20:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 844196d0eb47544a4f614fcb40154a41 SHA-1: c766e8d28e1d2a6049c5373c97b445883e803a00 SHA-256: 2a69013c53149653bc821087649b185c27b9fb725879c63ef5ad71c2ef418c9d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to trick the user into visiting a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=thaumcraft+6+permutatio+source PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467003/normal_6038d4b2b3683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_6029245d9947e.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/giCrjeA/pewesinesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5ff5824b08223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_602add91ee65d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5ff3f50df2d28.pdfIn PDF document text
    • https://cdn.sqhk.co/bureruverog/cif484c/gutevudo.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/tSgcpgi/puzzle_cars_45_pieces.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/eAgigha/system_of_linear_equation_formula_calculator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383471/normal_60091aa88d576.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/oJQYiiA/bazotidosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463830/normal_5fe7d59136e81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/776cdc64-4235-4d87-9937-1faef3eacc63/how_to_pair_skullcandy_sesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aee82a9-8c77-44d9-b1bd-e593d4e8943d/craftsman_8-amp_10-in_corded_electric_chainsaw_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ef1f8e-65f3-46cb-806a-16b160bdc007/54795386500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19f5698-1119-4a0a-84e6-9900ecb31643/31351583311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a82171d-e55d-4b49-9c23-e83ae08df36b/43603923914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefa65a6-ab14-4a18-a925-0ec69bb7c19e/how_much_does_a_muffin_cost_at_dunkin_donuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12adb6d6-a34c-4090-ac47-08c68792dd36/define_lean_manufacturing_in_your_own_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13bc52c2-62c7-4c8f-8c0b-d7970e63cd7a/jesarajuwinafonosor.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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 5324 bytes
SHA-256: 57898c503f42eb6e6cf1350a8e69f87bdd15a5537e1b8e881ef4131218e4789d
font_01_sfnt_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 10944 bytes
SHA-256: 6858da8c7aadc06757053f669fe889b0bb2b46acb1c56f9e45deb24f83b277ff

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