Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4962ad69ed2e50e…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 14:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b044f2abcbfae8e626bf81659c8d87dc SHA-1: b632c6d5333bf736c3f3e7439b01326b91bab4f2 SHA-256: f4962ad69ed2e50e2dc89dcd8a9b4f43ebaf9983860935b9a9cf7e4e419ea49f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=brandy+melville+white+sweatpants+review
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/molizadina.pdf
    • https://nozodipipagim.weebly.com/uploads/1/3/1/4/131438171/rovexefoliw.pdf
    • http://lifeeuro.info/the_chocolate_war_full_movie_freehuwgw.pdf
    • https://nexakolaligu.weebly.com/uploads/1/3/1/8/131871479/zobirerijixedatiduze.pdf
    • http://zimezobot.getenjoyment.net/dogadasodu.pdf
    • http://idealslimitalia-oficial.site/30290330690iqx7x.pdf
    • http://starconflict-game.ru/how_to_reset_mitsubishi_tv_remoteajfol.pdf
    • http://firobazotu.sportsontheweb.net/diagrama_causa_y_efecto_ishikawa.pdf
    • https://vuvudarekiw.weebly.com/uploads/1/3/4/0/134017261/1594481.pdf
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/nisutef.pdf
    • http://italysummer.space/puff_the_magic_dragon_easy_piano_sheet_music2k83c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_26af10783e7a4692b4a271093ab5aa5a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/90d460ae-dd6a-438d-aefe-26a30e111579/what_would_cause_a_dog_to_have_bloodshot_eyes.pdf
    • https://uploads.strikinglycdn.com/files/7a58d097-660d-4392-804f-9eba2d567012/honeywell_thermostat_ac_not_working_on_auto.pdf
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_7284b6b8a5684896b86e3f43525d27da.pdf?index=true
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_0dc5517d7fc84a99bb1e2126d5fc0385.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9e86b66a-51d7-488e-9daf-7ffadd55bc6e/cobra_detector_codes.pdf
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_6443d78824f0439ebcb63ceb4b210f71.pdf?index=true
    • 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_off0000e921.bin
6d3cda710039c498ba1fada49295b4c970103e88b38d519cfee299de43252707		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 5500 bytes
font_01_sfnt_off0000fbc7.bin
9ba377fdae082cb89e879e9ffee0d7df68294771ad34b51af4c65992a9756c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 11076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.