Malicious PDF — malware analysis report

Static analysis result for SHA-256 81fbdc8215752acc…

MALICIOUS

PDF

84.6 KB Created: 2020-12-31 20:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b874952b98b418e5abc22f61998dce8e SHA-1: 38caea39ffffc65a9cef0df009c885e82b22ccbf SHA-256: 81fbdc8215752acc790446fa1a18b1efc9a06d9ff8c9a0e006d27f9f42b838fd
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, trafftec.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'test plan template PDF'. No scripts were extracted, but the presence of external URIs and the ML detection strongly indicate malicious intent.

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://trafftec.ru/123?utm_term=test+plan+template+pdf PDF link annotation
    • https://cdn.sqhk.co/zururodi/iciePqN/how_can_draw_ice_cream_cone.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/ThfETHy/balls_bounce_lucky_break_bricks_games_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482648/normal_5fb8621a94af9.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/3hejtj1/bloons_tower_defence_5_hard_strategy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f908ccc887bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5f9dfd6700474.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/dibGpeo/snake_eyes_movie_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5fbebbcc8a685.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/aPhb5ic/murder_definition_us_law.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409102/normal_5fc8ad3667c79.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/iigjaiV/build_battle_code.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/dalava/beer_bottle_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/betetemevub.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/modimanorikisanulebazona.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_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 5040 bytes
SHA-256: 6007ba607d6611683de8ac240f97041682006b6805a737bf6cdcdb45ef1dc8d2
font_01_sfnt_off0001212b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212B 10716 bytes
SHA-256: a7704fabe9415d292cf20c28929cb1e92fe1d7f1724ee3181249d6f7eda90536