Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9ce0a66d6b91e7…

MALICIOUS

PDF

65.8 KB Created: 2020-12-27 04:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 819a7cf02b5861c1a21f98bfd4f42f60 SHA-1: cedd26716bce15a5a920c795ad5539e214b27a79 SHA-256: fa9ce0a66d6b91e712c1fb4863a1d037ae7df3aba65f6dea677bbdd50f94270e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to product information, aligning with phishing tactics.

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://trafffi.ru/strik?utm_term=wagner+control+pro+250m+filter PDF link annotation
    • https://cdn.sqhk.co/vakanaju/Avzhfig/pluto_retrograde_meaning_2020.pdfIn PDF document text
    • https://pinuzika.weebly.com/uploads/1/3/4/6/134640149/cb7eb6a37.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/geif0IF/50618554026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5fa2a0fd8a2f6.pdfIn PDF document text
    • https://cdn.sqhk.co/satovepato/RZQXtse/fire_and_water_5_ice_temple.pdfIn PDF document text
    • https://rowurasivove.weebly.com/uploads/1/3/4/3/134357219/soxizilalaxotimika.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/95fd193c-832c-4da7-8374-a32e91eacc72/subnautica_moonpool_fragment_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780c0b15-79e1-49db-bae6-efe005dc237e/determining_relative_age_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/motores_de_carros_a_venda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0697683-48be-4a9a-aacb-32867fc702d1/bissell_proheat_carpet_cleaner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/bu_jhansi_online_registration_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f1aff1-da33-4d43-a1c4-33286cade321/fatigus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef7970d-75e0-4644-a03b-325da47c1a21/77626432687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe3904b-85d2-452d-b0f0-a16ca8f4578e/56609846914.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_off0000c30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30D 5568 bytes
SHA-256: 2ece822d0b894fef64e4b5039f6d9e44d4fb0278f92961688e5eaa865062f6e2
font_01_sfnt_off0000d605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD605 10696 bytes
SHA-256: 436ec047beeb586e82d7c5bd41d0dcbfca88cbc21bbf522fc339227afcbd20e8

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