Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1af8d8dc9f17ef…

MALICIOUS

PDF

68.5 KB Created: 2020-12-16 13:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e303d48dc8fb771c293b63474fb5c067 SHA-1: 1b4f605d80644d9647a3ddbbaffb4dfda206291a SHA-256: bd1af8d8dc9f17ef6db01aa143b06f00048c987892750feda3cec60ef0c68c0c
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for users to download software. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

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://trafffe.ru/123?utm_term=download+zombie+frontier+3+mod+apk
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f8aa67829439.pdf
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5f9831d04473d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d7fb4e3f-d016-41fc-9eb7-deb1837f1696/36527614594.pdf
    • https://s3.amazonaws.com/kewakuko/beach_buggy_racing_apk_mod_unlimited_money.pdf
    • https://static1.squarespace.com/static/5fc5abc8084698658e7ee89a/t/5fd6a694e5ac5828962cf7fe/1607902869573/77421010659.pdf
    • https://s3.amazonaws.com/jidosatikim/kofora.pdf
    • https://uploads.strikinglycdn.com/files/ebd860b7-75fd-4162-8f7a-5204942d65ae/alphaliner_top_100.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1a84f6f5f91feb711d99/1606228613376/animal_raceway_unblocked_games_77.pdf
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc21c3d3570fb44d14ace87/1606556734443/the_to_do_list_watch_online.pdf
    • https://s3.amazonaws.com/sedimeraxufi/walter_rand_transportation_center_number.pdf
    • https://uploads.strikinglycdn.com/files/5582e3ba-4c4a-4317-9fba-1bea1a2eb67d/22563817561.pdf
    • https://s3.amazonaws.com/legipalofi/cima_f1_exam_practice_kit_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce59.bin
ae19eb295d08fbac34d14bf37e16f6aceefdc2aad45591b20e45bba0613ab8d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE59 5520 bytes
font_01_sfnt_off0000e126.bin
feddba27927413209400aded5199f6a8c72ad5031e4c6b1908b6cab250b79e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 10628 bytes

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