Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a87f2cd4502a76…

MALICIOUS

PDF

79.3 KB Created: 2021-01-15 00:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84c081ad74431f56e2a7478f5edd56e1 SHA-1: 9ae8e0d82723fa72acbfaea0ffcd8b159c478cc6 SHA-256: f5a87f2cd4502a769b73ba49169b872a8fbb674f12a88cb5a55ae02a52a17f05
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it uses an advance-fee scam lure, presenting language related to lotteries, prizes, and parcel delivery to deceive the user. The embedded URL likely leads to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/aws?utm_term=zenonia+5+equipment+guide
    • https://static.s123-cdn-static.com/uploads/4460232/normal_5fdf8e5e1c13c.pdf
    • https://cdn-cms.f-static.net/uploads/4427499/normal_5fe80b91e404e.pdf
    • https://site-1177444.mozfiles.com/files/1177444/turalelik.pdf
    • https://static.s123-cdn-static.com/uploads/4471479/normal_5fe033218f5e9.pdf
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5fb02fc5da2b8.pdf
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fdc097b41c4a.pdf
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f9c8850290b7.pdf
    • https://cdn-cms.f-static.net/uploads/4455898/normal_5fa19b204202c.pdf
    • https://cdn-cms.f-static.net/uploads/4463300/normal_5fbb7580c21f8.pdf
    • https://cdn.sqhk.co/pomodizad/cQljbha/carrot_cake_recipe_gluten_free_flour.pdf
    • https://site-1175908.mozfiles.com/files/1175908/subway_menu_bbq_rib_sandwich.pdf
    • https://site-1172851.mozfiles.com/files/1172851/tunuravuna.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000fa09.bin
ee20a2f9da3aeba44f5420a314ca50ad521e649ee42b923d3d429bc06c7ee888		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 5180 bytes
font_01_sfnt_off00010b9e.bin
b3635e89de0e0204718fd0a95c3c312880769f7ef90b7621d976a2c014c8503e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 10852 bytes

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