Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4688d8bac8cb75…

MALICIOUS

PDF

74.0 KB Created: 2021-05-06 16:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8421510f3c8a6af8e634573aad2c62bc SHA-1: 7b05c2d3d2bb03e1e55e7349f020e811a04c590a SHA-256: ac4688d8bac8cb751916d933868171fa1febf0e1ec2a4e6fecd93ccecae8d2e2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URL 'https://lozipotod.ru/strik?utm_term=what+does+bow+down+symbolize' is a primary indicator of this malicious activity. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=what+does+bow+down+symbolize
    • https://juloxiwam.weebly.com/uploads/1/3/5/9/135967800/7577630.pdf
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/kajefave.pdf
    • https://cdn.sqhk.co/sebixodof/kukI9hb/tikodexatiriva.pdf
    • https://cdn.sqhk.co/dipewoduge/c3ggShc/music_tiles_3_songs.pdf
    • https://cdn.sqhk.co/ganuniwiku/gtcieZF/masterchef_junior_desserts.pdf
    • https://cdn.sqhk.co/saligoliti/aLjajg8/mod_xans_virus_apk.pdf
    • https://cdn.sqhk.co/laruxibut/yic3jfT/66166810530.pdf
    • https://cdn.sqhk.co/ribuwikoli/jaiezjh/70636422571.pdf
    • https://xapiwelawuk.weebly.com/uploads/1/3/5/3/135341488/losijajexuzit-dipovufituroba-jefafuk-gavosore.pdf
    • https://cdn.sqhk.co/xoresarib/CPTYieB/gulilenurozejupujawim.pdf
    • https://nudaduxovusupin.weebly.com/uploads/1/3/4/3/134337963/5227690.pdf
    • https://cdn.sqhk.co/fadejiweruw/bm9o0id/archery_shooting_3d_mod_apk.pdf
    • https://cdn.sqhk.co/dolitife/6Rjgies/20451294909.pdf
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/midiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a2bd6681-7439-48e1-b1cd-5bd3b828b0a7/swann_security_systems_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/f9eca60a-80a7-4114-b742-28e6d03113b8/rimitelikuzubunanasevipo.pdf
    • https://uploads.strikinglycdn.com/files/3238d07c-7dbc-4ed7-b7b7-fe61208d4214/ps4_error_ce-33992-6_solucion.pdf
    • https://uploads.strikinglycdn.com/files/facae051-6ac1-48a2-ae5c-6d8371d683b4/ninezaxoragewonusafef.pdf
    • https://uploads.strikinglycdn.com/files/9a9b96bc-f9b2-455b-9cf8-9965290639b1/samsung_un40h5003af_price.pdf
    • https://uploads.strikinglycdn.com/files/a7420ebd-9f27-4b24-9324-f8ae0b6fad3f/6757402526.pdf
    • https://uploads.strikinglycdn.com/files/fa6543d8-9171-4edc-a762-555ada041181/best_moveset_for_single_strike_urshifu.pdf
    • https://uploads.strikinglycdn.com/files/6393b679-4666-4946-a174-f6ec2f005feb/sears_12_belt_drive_band_saw-sander_manual.pdf
    • https://uploads.strikinglycdn.com/files/dfaaa8d1-c75e-4710-bf9c-1be6dd3e6859/22246209146.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_off0000e4a8.bin
99c107b5ebbf0c433a67513a38addc5af0aa66ec064c64ef888b6216230d0657
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 5368 bytes
font_01_sfnt_off0000f6e5.bin
547368d34fb5cfcca68d0192b6d270c9e683ad466dfee5b13cb01ab15a027bd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 10212 bytes