Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b01d2d3228e6ce…

MALICIOUS

PDF

94.8 KB Created: 2021-02-08 16:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4765fd1a33348ecf6968fcfbaa112f41 SHA-1: 3da02fa51181dc1b1d37a1582a2328e5a1eb2bec SHA-256: b9b01d2d3228e6cedb4edb62cb13e366592c459cf39a29cefc35eb0415873abb
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'vault guide' and 'consulting firm rankings', suggesting a lure to trick users into visiting the malicious URL.

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://crophysi.ru/aws?utm_term=vault+guide+consulting+firm+rankings PDF link annotation
    • https://cdn.sqhk.co/febowozefu/jjgc1ib/microsoft_365_admin_app_store.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/fender_blues_jr_schematic0ruye.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/nufidibodudulad/texas_commercial_motor_vehicle_drivers_handbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/tasori.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/vmware_32_bit_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/sedujubegekemeduvo.pdfIn PDF document text
    • http://piwefijegiv.epizy.com/tv_guide_listings_appleton_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/happy_birthday_piano_music.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/antony_gormley_sculptures_formby.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/chessbase_free_android.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/finofurugij.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_off0001332d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332D 5372 bytes
SHA-256: 70135529c6f86ea7dafc345abe2dfc1b8b357315626bfed2e27b173285d58654
font_01_sfnt_off00014563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14563 12368 bytes
SHA-256: 51a826243c4fc281209c1d85781759ca28670975a5195238381573059048b637

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