Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4922c24e6b6622…

MALICIOUS

PDF

71.8 KB Created: 2021-02-28 06:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4a60568fce9ad05614c03bdfb8c29206 SHA-1: d597b92776601f336291dd6e123ef39261e8000c SHA-256: 0a4922c24e6b662202181f8fb908817849b39c22254c7b8411f05810fb621065
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded external URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate it's designed to redirect the user to a potentially harmful website.

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://maypoin.ru/wix?keyword=limiting+reactant+stoichiometry+problems+worksheet PDF link annotation
    • https://cdn.sqhk.co/wexovezojab/ihfzfji/sudoku_6x6_hard_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_6035986a103a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5ff4d0bdec233.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_5fcb2dd06eefd.pdfIn PDF document text
    • https://cdn.sqhk.co/panazomuv/heOEQhF/68573039008.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/qt0iegi/xfinity_streaming_box_apps.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/what_punctuated_equilibrium_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/hgjifgc/elifoot_19_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6032e2ca577b2.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/bTgjzzY/second_hand_designer_clothes_online_mens.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_602825ad34af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_600cb01f3ca26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fd2ce2675541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367938/normal_6003461187290.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/jijari/wufuragosipova.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/39654603567.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/verb_conjugation_practice_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_off0000daff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 5684 bytes
SHA-256: 27823e817d12b876ede8b63a1a67f5c7178e895eafc646cf8291547a1f36e4a5
font_01_sfnt_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 10376 bytes
SHA-256: 38488d396437c2c595d5c582da3b95b7fdf92e34018f00bc6c28514195a59e99

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