Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2592f8b80563f17…

MALICIOUS

PDF

71.0 KB Created: 2021-01-16 14:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa8dd13376b3b9973034c5782317e5a0 SHA-1: dcd4b925b918664c962085f31aa3e9215ae77e02 SHA-256: f2592f8b80563f1739589c993cb0c355af905588b765bd65ae78470cf40f11aa
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be related to a book title, suggesting a lure for phishing or malware distribution.

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://traffnew.ru/123?utm_term=pat+the+bunny+book+pdf
    • https://cdn.sqhk.co/joxesinejag/1ufL58I/37117174277.pdf
    • https://static.s123-cdn-static.com/uploads/4390995/normal_6002270d85d6a.pdf
    • https://cdn-cms.f-static.net/uploads/4452608/normal_5f9f0fe8f1487.pdf
    • https://cdn.sqhk.co/disumuneriva/hbWpjfh/win_vegas_free_777_classic_slots_casino_games.pdf
    • https://cdn.sqhk.co/susotizakaxe/jcifjGi/bcycle_madison_locations.pdf
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8a82e5cc37e.pdf
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f8f8458c0fef.pdf
    • https://cdn.sqhk.co/nakokixega/sjgMjgX/38621174983.pdf
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5fb9469abc1d4.pdf
    • https://cdn.sqhk.co/zesonixiv/wjcbfjd/real_stickman_crime_2_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/genijusemu/wordscapes_answers_level_1086.pdf
    • https://s3.amazonaws.com/dabatisew/41595005378.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_off0000cac7.bin
9ba8fe5054743674d074f2b977eb1460c45d96652acff619ee3940299dc3994c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC7 4964 bytes
font_01_sfnt_off0000dba4.bin
808ab85f40da8dab9044a7693150076b0624f0d901d6f0525f2e00e268dc5467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 11016 bytes
font_02_sfnt_off00010120.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10120 4324 bytes

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