Malicious PDF — malware analysis report

Static analysis result for SHA-256 383d047bb696e959…

MALICIOUS

PDF

69.2 KB Created: 2021-01-03 02:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 29a77eb888b4752a7328bf0829681f65 SHA-1: 717dda10dee11f72b10d6e86cf1e5ec8f7f0dba0 SHA-256: 383d047bb696e9594740ceef0157fbddae8f64c4e7fe113e820236e981e5897c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social engineering lure to trick users into installing a browser extension or update, a common tactic for credential theft or malware installation. The embedded URL points to a domain associated with this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://trafffe.ru/aws?utm_term=cookies+google+chrome+para+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455886/normal_5fcaad5a17ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_5fa01a07ea62c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_5fc067c54634a.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/iWihidl/fallout_shelter_online_release_date_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466661/normal_5fcf67953e2ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fc5b5ab4f7e2.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/3ij35ih/farolatobitemu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fe1fed2396e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5f945019345c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_5fd119dcf0a66.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/vixuwogetiv/ablebits_data_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c9424b-ac85-4906-9f8a-42cb3235f665/88170152245.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_off0000d147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD147 5456 bytes
SHA-256: 28ba64d9831d6c7ba3346fa98c04f30734dafd98562b6eaa888b2cb9cc7ebc3d
font_01_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 10708 bytes
SHA-256: 829fe93cd9ba785b7c773241778f032a7c2c9df0633517ce4ce91e3ad19a9689