Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e319f8371bf89c1…

MALICIOUS

PDF

87.5 KB Created: 2020-12-25 06:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbd36fdc7eb37a57f50f816be86f4b6e SHA-1: 5963fb3f476dadf1bfb8d8612bc9bdb5b9e47b6a SHA-256: 1e319f8371bf89c1b27f3de888d5848a6fde0330a1b0d99c4d6168077b31a6d7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains strings related to 'Pathfinder 2e class feats' and the wkhtmltopdf application, suggesting a lure to a malicious URL.

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://traffnew.ru/123?utm_term=pathfinder+2e+class+feats
    • https://cdn.sqhk.co/pozuwifofub/S2Oad4e/gifabazovulabakokegokavof.pdf
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5fbb3d43ed220.pdf
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5fdad58fd92d4.pdf
    • https://cdn.sqhk.co/peluxisomex/S2J7iXH/ice_cream_lyrics_blackpink_english.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zozuxukoxo/bus_game_new.pdf
    • https://s3.amazonaws.com/xisefowu/vekavidolukukesupegej.pdf
    • https://s3.amazonaws.com/tumasun/free_chrome_offline_terbaru.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/function_of_carbonyl_group.pdf
    • https://s3.amazonaws.com/zunewidimem/jurug.pdf
    • https://uploads.strikinglycdn.com/files/025152f0-33eb-4cf9-9c6e-1651e6fe192f/eco_365_week_5_knowledge_check_answers.pdf
    • https://s3.amazonaws.com/toguvaju/54368290012.pdf
    • https://s3.amazonaws.com/bokexizometun/85338555244.pdf
    • https://uploads.strikinglycdn.com/files/cc629e6b-4265-4b27-9b4f-24ad0d831bba/vidgo_customer_reviews.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f1b.bin
84242cbc31c3bce71d449b0751a8a29f8892d756697a6e1a26c39f1e98bfa94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 4920 bytes
font_01_sfnt_off00011fbe.bin
c643b0de5dd2b58962cb70718b9cc8aeedf430ff218382e50d8642bc76682dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBE 10364 bytes
font_02_sfnt_off00014313.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14313 4324 bytes

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