Malicious PDF — malware analysis report

Static analysis result for SHA-256 875a73912c06fbfa…

MALICIOUS

PDF

83.0 KB Created: 2021-06-09 15:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e8352fb7dcb34ce681c102d9be132ab8 SHA-1: ea2f96a01f81fd1b1a9b3fac8803a6f17fd77b1a SHA-256: 875a73912c06fbfa909862dfd9b488cdff1b8697e3135b20e01a3d4623f97c13
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, with a specific heuristic indicating it's an MFA/one-time-code harvesting lure. The embedded URL points to a domain associated with phishing. While no scripts were directly extracted, the PDF structure and the lure suggest it's designed to trick users into submitting credentials or MFA codes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://garglob.ru/pbw?utm_term=tatkal+ticket+form+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490515/normal_6030f9363b313.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4389104/normal_60b4b8a0a91a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471682/normal_60146bf5ce3a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443824/normal_5fe3f224d385a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494883/normal_60b9dc0a98bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_604b6e21a39d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453890/normal_5fcfb034bc5f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486201/normal_60bc0b68e391a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fe35c9a58dbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_6058dfd916b6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417037/normal_60067cdc22117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501962/normal_600060f24e7ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474719/normal_60bad6b3dc868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9155781a-bc29-4e94-94e1-53e69a3b8841/kilorezuboserat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c563993b-a46d-4c53-b7b6-570081d4627d/gewuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10306f6-9482-4ab2-8281-ff07f19ed24a/descargar_geometry_dash_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d068417-411e-4d30-9fc8-4ade82fa9a48/how_to_use_smartparts_digital_picture_frame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b397d87-ad64-4597-957d-ee1274a54839/69430944481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2382fb9e-ebfe-4b67-906e-f882bc006316/55875395126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b80ade-dceb-4fcf-8173-ec58d599ed3c/wahl_beard_trimmer_target.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_off0001076e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076E 5136 bytes
SHA-256: 30cc032d8102fca8a374ef2843276618eae470d874f5eccf149a932d805b542c
font_01_sfnt_off000118d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D8 11256 bytes
SHA-256: 3562d504a5d1da98cdad2e9e6238a288ca2341181daa61cf74e825abf2ee7940

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