Malicious PDF — malware analysis report

Static analysis result for SHA-256 971f56b8d7dc31db…

MALICIOUS

PDF

68.9 KB Created: 2021-03-15 01:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f1c4bf98ef93a365cde334f6f1210d6 SHA-1: da3450e3ab860de32ddb260c40bd7bfa28556682 SHA-256: 971f56b8d7dc31db3d9cf526d5f40676d61804bd84964f011f90232d22859c39
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a context related to 'command and control policy', further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=command+and+control+policy+ap+gov
    • http://onkoprofi.ru/kumonadovuforudiuba7w.pdf
    • http://help-mediasupport.com/white_kitchen_family_room_combotjhqn.pdf
    • http://2gusevshop.space/wariwajepisabunclui.pdf
    • http://foyou.store/91772135955a40sp.pdf
    • http://trikotoria.ru/strength_training_exercises_at_home_without_equipmentt16k2.pdf
    • http://leoidet.xyz/mathematics_textbook_for_class_8_chapter_14_factorisationmidt5.pdf
    • http://nugawijuxuv.mywebcommunity.org/pathfinder_alchemist_character_sheet.pdf
    • http://reduslimitaly-official.website/what_kind_of_education_is_needed_to_be_a_real_estate_agentsvf8x.pdf
    • http://larts.digital/12976793464m89ie.pdf
    • http://yazansoft.com/11th_half_yearly_answer_key_2018_englishvfs83.pdf
    • http://vurovolapoza.mygamesonline.org/25995180929.pdf
    • http://alfa-quest.ru/bejuralubisekopawum0qvtw.pdf
    • http://naturmilans.fun/xufepobidukezoforef5s3f.pdf
    • http://stavki.link/compare_apples_to_oranges_meaninghcly8.pdf
    • http://silekutum.medianewsonline.com/analiticka_geometrija_knjiga.pdf
    • http://molotkov.site/20663775975rddj1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lelizudowekup.rf.gd/65119106421.pdf
    • https://uploads.strikinglycdn.com/files/fb8320b5-f121-4130-b732-2c958674e7f8/how_to_reset_your_wii_u_gamepad.pdf
    • http://xejobutek.onlinewebshop.net/concrete_mix_design_submittal.pdf
    • http://kepofif.onlinewebshop.net/72687114023.pdf
    • http://pasazaxara.rf.gd/34581050211.pdf
    • https://uploads.strikinglycdn.com/files/2cd7f6db-1369-4b43-aeda-dd5ba88d7728/fenix_2_apk_cracked.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_off0000d259.bin
ebddf851dbe5c77f272b6cc052b69a2bee3185133bee2cadc88295a61a254c6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD259 5280 bytes
font_01_sfnt_off0000e443.bin
e36767208ac21927e505da445b339774c1c0c21bb57b099f00395f41cdfe0d35
pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 10028 bytes