Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c38dee1b1d594a…

MALICIOUS

PDF

94.5 KB Created: 2021-03-02 17:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a5ab407f13c54df9294a42f0e215546f SHA-1: e0e86094e933bba47607869c884098716ca16e9c SHA-256: b6c38dee1b1d594a83a7ee1239bd8f18e29c75e5bef0c4ea95ad2ede6fc139ee
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of an external URI and the high confidence threat detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=dyson+v8+animal+cordless+stick+vacuum+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5fd28e2959208.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415331/normal_5ff0f743c633b.pdfIn PDF document text
    • https://cdn.sqhk.co/dejowipapoli/hcghhbF/24176108668.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/ih19jd5/retrograde_pyelography_pronunciation.pdfIn PDF document text
    • http://youralteragoods.com/gofakudosa53b8p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_600fe12ec1acc.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/tezofuretejom/54749573047.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/codycross_answers_group_2_puzzle_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/briggs_and_stratton_push_mower_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/cotton_king_size_bed_sheets_online.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/game_of_thrones_episode_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/commandos_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/73007908469.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/19983170307.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_off00012fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA8 5640 bytes
SHA-256: 554197b98d3ab4caf3609c7cfa5bf8340d4c5d1ca41ccd2ef7fda2f3afb08802
font_01_sfnt_off000142d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D4 12544 bytes
SHA-256: 6e325911240127a370ff6d1278e16a81959b4062256a8da614c55a195e324dc1