Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23f341bd9657d6c…

MALICIOUS

PDF

86.4 KB Created: 2021-03-16 03:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54b46bd8193f0e7da2c2d3dc2713657c SHA-1: b21b4023cecf64a7f6b41ae63006f68c2fbb576c SHA-256: f23f341bd9657d6c5e52f14a8c2d6382cf2cec3e8e49e92b9aa1b550eb3facc7
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by both ML classification and ClamAV, with a high risk score. It contains an embedded URI pointing to 'bologen.ru', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=ffxiv+castrum+abania+2nd+boss
    • http://piwudev.iblogger.org/battle_for_wesnoth_strategy_guide.pdf
    • http://wozilimesiz.mypressonline.com/abbyy_transformer_3._0_activation_key.pdf
    • http://zirirukefup.22web.org/evil_dead_movie_in_tamilrockers.pdf
    • http://zefonurogize.22web.org/cat_2020_question_paper_download.pdf
    • https://cdn.sqhk.co/pagupuxu/X4VjeTo/32757614269.pdf
    • https://cdn.sqhk.co/temetixufuxi/j5ggihT/guess_the_picture_game_answers.pdf
    • https://cdn.sqhk.co/buzovegom/jLhgjdC/15684125293.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://suzusufiwavel.rf.gd/noxufosovavi.pdf
    • https://s3.amazonaws.com/laginekux/gimobogoramod.pdf
    • http://senesijosezetu.myartsonline.com/what_is_informational_power_in_leadership.pdf
    • https://s3.amazonaws.com/jesidofefe/jewumopexizevawas.pdf
    • http://xevatukojubu.epizy.com/curso_de_marketing_digital_y_redes_sociales_gratis.pdf
    • http://garimawaje.rf.gd/wahl_trimmer_parts.pdf
    • http://vekisofekibote.myartsonline.com/array_c_tutorial.pdf
    • http://sotewupuwen.epizy.com/who_is_the_most_to_blame_for_romeo_and_juliets_death.pdf
    • https://s3.amazonaws.com/bovenotojitowe/digital_abbe_refractometer_manual.pdf
    • http://xepepofebaxuvib.epizy.com/nukisaw.pdf
    • http://dokelegusipodi.epizy.com/cisco_anyconnect_ordering_guide_2019.pdf
    • http://suduxegowur.onlinewebshop.net/weganatobibewikuwesa.pdf
    • https://s3.amazonaws.com/vavabi/bendera_indonesia_hd.pdf
    • https://s3.amazonaws.com/fazujo/levub.pdf
    • http://sibubixusa.epizy.com/interior_doors_buying_guide.pdf
    • https://uploads.strikinglycdn.com/files/112ea4e0-7eec-45b8-b04b-6625bd6c2512/gigabokakaruw.pdf
    • https://uploads.strikinglycdn.com/files/06ed58b2-c3b4-4120-8782-353eff394cd3/negeb.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_off0001157b.bin
84564149666819caebc30f53baa1328f6abcfacc17117abe55afd6f8edee50bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1157B 5488 bytes
font_01_sfnt_off0001281d.bin
243b0a252ce95e1a9b5f3a75c49a70f8a570bea91cd381d70746e9ad44f9a4c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1281D 10404 bytes