Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8eeaf98bd3a22bf…

MALICIOUS

PDF

67.8 KB Created: 2020-12-16 23:22:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a936a815c8686c547f39d982fbb52fbc SHA-1: 71382e265fce0077778fac71d98322856b39678a SHA-256: f8eeaf98bd3a22bf27d391db7fb801615ab70d36950727854e7fc9b328d81fa3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an external URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be related to a 'Cessna 150 service manual', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=cessna+150+service+manual PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab954e7-1971-46e6-8b0d-8ef41658146d/63273099565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb2ad10-d05c-4d73-842a-b6c752512f2a/el_dios_de_spinoza_texto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aec276d-cee9-432f-8f2a-b80f293cbce5/tobera_de_flujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb69611a-40e7-48d9-b0d9-8e35d1de7bdf/mijejodebiroxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729d53bf-d3d2-4ce4-9b44-a85910a83bfd/virajetokunemasak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a3d71b-5a03-48f6-a953-602a11d6a61f/town_of_sunapee_tax_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b2d647-ebea-462a-8fec-782bf58a4435/9_snf_biyoloji_test_ak_ulu_sorular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22737fc1-9547-41ff-8752-bd6a9667c714/jipoxexe.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/digemar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbf8912-8cc1-4ec4-8e7c-204dbcb70cf3/6296471000.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/tell_me_about_yourself_best_answers_dating.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_off0000cc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC07 5228 bytes
SHA-256: ada5b632bba571e6678f4e294445cad8d23410cfcacbb2124615dd8ce2a16947
font_01_sfnt_off0000ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 10844 bytes
SHA-256: 08f36a676c77ce3f0223a3d5fdc5a1b8719a94da000cbcd9c2cf25ae4e9703ac