Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc21e3ccd556c8a6…

MALICIOUS

PDF

64.6 KB Created: 2021-02-01 17:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 06ebc6dacad97fff67d31b9e62a8f6ba SHA-1: 72ba1c6a6c90cfca80e3a004c2d872ece4c3f697 SHA-256: cc21e3ccd556c8a6809178ef7df1d0152482bff787ae7236c939cf876b6e32df
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'smoked ham shanks for sale', likely a lure to disguise the malicious intent. The presence of an embedded URL suggests an attempt to redirect the user to a phishing or malware distribution site.

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://jottigo.ru/123?utm_term=smoked+ham+shanks+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5fd17e3c699fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_6005a81cbb891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493201/normal_5ff279ab12d23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458137/normal_600929cf7149c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5fd1fadcbadfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401971/normal_5ff54dd955e51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409257/normal_5fe0e0ee2c3ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416301/normal_5ffe821a3f2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_60135b4ab2a50.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/xovajukoxin/spider_man_3_game_ps2.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/40555322141.pdfIn PDF document text
    • http://dozonox.epizy.com/construction_and_working_of_dc_machine.pdfIn PDF document text
    • http://jirozeb.epizy.com/52402722613.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/gokekeribumutivezekovuw.pdfIn PDF document text
    • http://jojemoditupu.rf.gd/learning_write_letters_alphabet_worksheets.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_off0000bf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0B 5312 bytes
SHA-256: aaa28bdd574ac0ac31c7e624d769c8190132f62e55221aac96b00c6f9c7da9ca
font_01_sfnt_off0000d0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EE 10760 bytes
SHA-256: d9513407201a64338d44d65888a2d57c080052b566b6672a2134d7f78a8142f0

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