Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb9de2571fa0d1a…

MALICIOUS

PDF

70.7 KB Created: 2020-12-24 11:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f12bee45914fb30d3cc2be78ec916cd8 SHA-1: 199ba813704f97c4ff0b4f58c3515b04eab26254 SHA-256: 8bb9de2571fa0d1ac0e3ebaf5b4e17c13fc4d7815fbab9ee2f58486fe4bd5548
96 Risk Score

Malware Insights

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

The file is a PDF document detected by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URL pointing to a suspicious domain, trafffi.ru, which is likely used to host a phishing page or download a secondary payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=cluck+night+ios
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f9c8dd42db7e.pdf
    • https://cdn.sqhk.co/nosuterib/db5sxhd/street_racing_atlanta.pdf
    • https://cdn.sqhk.co/naritiba/RGdUIrP/ihsa_football_championship_2019_directv.pdf
    • https://cdn.sqhk.co/nalogigoke/eieOgiC/rounded_corners_photoshop_rectangle.pdf
    • https://cdn-cms.f-static.net/uploads/4409421/normal_5fbb8bb61dfe2.pdf
    • https://cdn.sqhk.co/retirijozi/gdyEVGU/givex.pdf
    • https://cdn.sqhk.co/netesatova/dzgjcgg/wetofejufuguraninero.pdf
    • https://cdn.sqhk.co/nebuneduzib/ha8jqid/rally_s_menu_marion_ohio.pdf
    • https://cdn.sqhk.co/gagufatemo/Tgfjerj/28010908628.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wajufifenoxuj/bearfoot_baker_templates.pdf
    • https://uploads.strikinglycdn.com/files/0d71d082-4e8c-4af4-aefb-8e9442ed184a/covalent_bond_energy_worksheet_answers.pdf
    • https://s3.amazonaws.com/xapijifas/90223118407.pdf
    • https://uploads.strikinglycdn.com/files/92d17882-51cb-4e83-ad73-fc23e742fc7a/begisevarudanuzovijame.pdf
    • https://s3.amazonaws.com/foneniz/railway_reservation_app_free.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_off0000d9b1.bin
b8d55ebce520781eda5f54f89b8ad6e4a3da3094a7025f591d8bea5693bca3d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 4724 bytes
font_01_sfnt_off0000e9cc.bin
234bb4b87a525f0cab303571273c885e40fbe283f72b5f9b8b53a1e0e17359e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 10696 bytes

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