Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4c52222b5e59fe…

MALICIOUS

PDF

85.4 KB Created: 2020-12-29 10:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f87f22c659c58d95a41a64c339f87115 SHA-1: 1b68117762e9164112f517df623fb7f6e720ebfc SHA-256: ae4c52222b5e59feac9160919e00ccbec884361c3a0731c851acb2656ceb92d3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=laser+wood+cutter+machine+price+uk
    • https://static.s123-cdn-static.com/uploads/4401691/normal_5fcc297b58ccb.pdf
    • https://cdn.sqhk.co/dupeguwova/dkidD4c/masha_and_the_bear_cartoon_characters.pdf
    • https://static.s123-cdn-static.com/uploads/4479705/normal_5fd03431b213b.pdf
    • https://cdn.sqhk.co/rosafipex/jJbyhbG/musibaza.pdf
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5fe8d9c4b725b.pdf
    • https://cdn.sqhk.co/lepitajirel/djegc8s/pasemupesuxakijunubiru.pdf
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fe400d540e67.pdf
    • https://cdn.sqhk.co/salenasova/dbbjdB4/snappy_logos_key_code.pdf
    • https://cdn.sqhk.co/vutexexukus/ejhTNji/hello_ice_scream_freaky_neighbor_horror_game_3ds.pdf
    • https://cdn.sqhk.co/ribegibonot/jiihSjj/cool_math_games_fireboy_and_watergirl_2_player.pdf
    • https://cdn.sqhk.co/bidomutarili/hahbjaX/newukilu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/donarepemi/5179336579.pdf
    • https://s3.amazonaws.com/falevi/bet_365_latest_apk.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_off000111d8.bin
8fad1a2e10c3f59d1739046f0e48b1a8bcf154f5606e933e1edf512a5ae4dd8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D8 5380 bytes
font_01_sfnt_off0001240a.bin
195984b16e2795b950991c61781ae17994262d1316df0c02e3c0b58af1b1e348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1240A 10868 bytes

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