Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2f1e4e9b4504c9…

MALICIOUS

PDF

67.5 KB Created: 2020-11-20 08:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4272cc43b2d2acb07fda709458f9701f SHA-1: 71450cd1ba83ae02d7034b2aedfd6c5962f60c64 SHA-256: 1c2f1e4e9b4504c96559cbc93bb8db4d4fe29431ed1f3189597d1c95f27310ea
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafftec.ru' which is associated with downloading an 'activator' for Office 2010, a common phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=ativador+office+2010+phdowns PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420434/normal_5f9cb140a7c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f892532e864d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f9a6bec41844.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/roxawo/manual_for_brother_hc1850_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/65050532721.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/volonelibijilek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98b86ef-0241-4556-9dbf-2dfa52d6d0a7/zovinagodojale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8f0c1e-3e5e-44a2-adb4-380812753534/how_to_cite_a_song_with_multiple_artists_mla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb8e865-03f9-488d-a904-9cf31471a0b4/vaxisikufekonemo.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/chevrolet_epica_2009_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/mcse_interview_questions_and_answers_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58184393-7b75-4d13-94a8-5e6788a57aae/somozodizoxowapadisuduvok.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_off0000ca7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7D 5676 bytes
SHA-256: ee74bdacaa8a5619e9acd54be0983daae7d22c9268300c474190bae0138b74c3
font_01_sfnt_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 10432 bytes
SHA-256: 390d31e4e53e5c4c5cfe4d0c4a6d8bbf849a8e1588329b59043d5877d53eeade

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