Malicious PDF — malware analysis report

Static analysis result for SHA-256 42865c05dbed7089…

MALICIOUS

PDF

69.5 KB Created: 2020-12-31 10:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eef131ccfafcc1df87688ba07ad6166f SHA-1: 1baea595a0b610598db1e5e52194f4a86539566b SHA-256: 42865c05dbed7089f15edeeda0d228debec4fae6545913c604c1a6dbcddbbf8f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text related to song downloads, suggesting a lure. The presence of an external URI and the ML classifier's high confidence further support a malicious classification.

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://trafffe.ru/strik?utm_term=memmedbagir+bagirzade+gorusersen+mp3+yukle
    • https://gupaxapofigovi.weebly.com/uploads/1/3/4/3/134356466/2249438.pdf
    • https://cdn.sqhk.co/zenetofuma/0hccuCV/idle_food_restaurant_tycoon_empire_game_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5fb4df85470e5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jivagajamav/42873980157.pdf
    • https://s3.amazonaws.com/dogazisuze/calculus_and_analytic_geometry_notes.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/suwomekugaxufujavudama.pdf
    • https://s3.amazonaws.com/jusuberu/81649707684.pdf
    • https://s3.amazonaws.com/xipavir/andy_beshear_platform.pdf
    • https://uploads.strikinglycdn.com/files/1af197fd-c4f6-4ae9-bef6-5a97500be0e7/run_man_2_game_football.pdf
    • https://uploads.strikinglycdn.com/files/0888df73-dd94-4698-ae58-e9607e680d12/lehnes_pharmacology_for_nursing_care_audiobook.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/franchise_manual_template.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_off0000c503.bin
59e9e30f0668240faf9ed99d2457a3269676ae571ecbe6269032f591d9fa206b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC503 5804 bytes
font_01_sfnt_off0000d8c7.bin
a952a4aab614ea526138d1b7eca4506bc8505629018c7aee81de8322edc5104c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 16632 bytes

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