Malicious PDF — malware analysis report

Static analysis result for SHA-256 9776d761da26e871…

MALICIOUS

PDF

75.6 KB Created: 2021-02-17 18:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 324ef0ab86f1a7f568db797f47137d66 SHA-1: 49863c790addffe807048d0eb10a0d83f9fbd8d5 SHA-256: 9776d761da26e8713adfc26d81cc86cbe1da351501d0e19abe4b3c0d54febee4
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'complex carbohydrates' and embeds a URL pointing to 'baarspo.ru'. This URL is likely intended to lead the user to a malicious site, possibly for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

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://baarspo.ru/123?utm_term=what+are+types+of+complex+carbohydrates PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424933/normal_60276d3603774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_5fe9d41749361.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/fiehilZ/endless_runner_games_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5ff8486b43ea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_60286a30c0184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5ffc715054e4e.pdfIn PDF document text
    • http://interbank.link/dragon_world_games_to_playwb5hg.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/zoluwivebiro/arctic_ice_sheet_history.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/zakiziwulixupuwewisakukil.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/mole_mass_problems_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/editable_degree_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/logic_games_lsat_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/captivate_us_performance_track.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/ay_khuku_aye_song_free.pdfIn PDF document text
    • https://medlineplus.gov/carbohydrates.htmlIn 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_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 5716 bytes
SHA-256: 20f456d9ab84154c3192e83a2d6e2d1c45a28e5a5c8ab138d6312d66ed42b398
font_01_sfnt_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 10524 bytes
SHA-256: 73e89bea81ee57cc1e4bfd3d6709ef6a7ca10ea072517b971ecd0ef0fb6b27c3

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