Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1a88c359cbb80a…

MALICIOUS

PDF

86.5 KB Created: 2021-04-04 19:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6cc61dbe6757d8fea0784668fe80366 SHA-1: 24a8d16fcff32b63f49ec70cb2c952f60bd24ad8 SHA-256: 4e1a88c359cbb80a2254e34511a1ffb951ea439f44191cd26f29f54bfdbb756e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'dugedepap.ru', a domain commonly associated with phishing and malware distribution. The document body, though heavily obfuscated, suggests a technical document lure. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to a malicious site.

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://dugedepap.ru/123?utm_term=advanced+aseptic+processing+technology+pdf
    • http://priz24.site/volipir13e0i.pdf
    • https://cdn-cms.f-static.net/uploads/4425237/normal_6034de39943c1.pdf
    • http://ejinaya.com/dapokmjuox.pdf
    • http://help-feedback-amzn8.xyz/73005023841xgzgd.pdf
    • https://cdn-cms.f-static.net/uploads/4424026/normal_5fd22974b0236.pdf
    • http://zujoxuxosaja.getenjoyment.net/sonifojuzovijopuvikog.pdf
    • http://masajsalonunuz.com/cable_reseau_player_freeboxmznp4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zodererezuzuxi/does_a_cup_of_tea_cool_you_down_in_hot_weather.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/andres_oppenheimer_libro_crear_o_morir.pdf
    • https://s3.amazonaws.com/levovod/majesty_2_pc.pdf
    • https://s3.amazonaws.com/mizeteb/what_are_examples_of_interpersonal_conflict.pdf
    • https://s3.amazonaws.com/faduxodiwo/sports_direct_infant_trainers_size_guide.pdf
    • https://s3.amazonaws.com/lurutopobi/luselusegurijip.pdf
    • https://s3.amazonaws.com/zopenave/lejutesixop.pdf
    • http://nemenarubaz.atwebpages.com/86592852649.pdf
    • https://s3.amazonaws.com/memexelu/32180822604.pdf
    • https://s3.amazonaws.com/rebomedug/chamma_chamma_song_hd.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/john_deere_x300_48_mower_deck_parts_diagram.pdf
    • https://s3.amazonaws.com/temujonuwu/hp_compaq_8000_elite_cmt_specs.pdf
    • https://s3.amazonaws.com/befarekogol/4359875304.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_off000104d7.bin
c4f1ea618b0ee707a585bffda45a7a3ff14503faca5016c990f7af3d1915311b
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 5356 bytes
font_01_sfnt_off00011710.bin
ec1a13902e77f494370267fb229bc60b6241f71e2523f5ff920a61645edfbe1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 11920 bytes
font_02_sfnt_off00013e47.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E47 4324 bytes