Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3ff550cd129555…

MALICIOUS

PDF

72.1 KB Created: 2021-01-25 15:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 09eef77ef2a3691c9cea0fbb326a3d45 SHA-1: e98c44da26e4739a7b76544814d7e49ac9abb1bf SHA-256: 0f3ff550cd1295551ddde9968da5fc84f409f74f75ec81d4b86b4e382d4f5f07
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 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 'Barriers of verbal communication pdf'. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=barriers+of+verbal+communication+pdf PDF link annotation
    • http://opssmall.space/brick_blast_game_download93mz0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5fd7ca1ab6ce1.pdfIn PDF document text
    • http://5gusevshop.space/drag_and_drift_mod_apkbw975.pdfIn PDF document text
    • http://ourfutures.space/hitmonchan_evolution_sword_and_shield643z7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5fd924720bfa0.pdfIn PDF document text
    • http://virnet77.ru/red_ball_hero_adventure_pokia1v6u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexepetilak.rf.gd/axis_mutual_fund_online_empanelment_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/treatment_of_hypertensive_emergency_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/hepatitis_a_cdc_information_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/chemistry_notes_spm.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/laptop_cpu_performance_comparison.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/logup.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/blockchain_technology_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/wedding_invitation_card_background_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/8842873881.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_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 5548 bytes
SHA-256: c1d0e36e41b75e4210bd074e08fe2efc70ec771ad687b5b90df68a0d89d099ca
font_01_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 9440 bytes
SHA-256: d03ae781efee5fbcc6e2d5e8ee6c7f9300d92424fd22b6a285275da976d2e9ff

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