Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e84362dedfaed0…

MALICIOUS

PDF

70.3 KB Created: 2021-03-20 16:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ebbc09c3672339b4824f218857162208 SHA-1: 634bfa4eb0b08176e3a67a54f250319a97da0a06 SHA-256: 14e84362dedfaed0ec18a54d43c58ace102c263d4e0b5513e1c8cf50df9ca57a
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to suspicious domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest malicious intent. The presence of a password-protected archive lure heuristic further supports this, implying the PDF is a component in a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://bologen.ru/strik?utm_term=bradesco+seguros+portal+do+corretor PDF link annotation
    • http://dream-stat.ru/study_island_answers_for_math_7th_graden5lak.pdfIn PDF document text
    • http://esagafow.fun/netflix_laptop_windows_7tsv7h.pdfIn PDF document text
    • http://fabermanufacture.ru/gunituf3udxm.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/eiijbU1/30927262983.pdfIn PDF document text
    • http://bullbananavannaone.xyz/algorithmic_notation_in_data_structuremyzi1.pdfIn PDF document text
    • http://familyit.info/mexixisikugivamanud47q4.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/eQ1BifL/eclipse_todo_not_showing_in_task_list.pdfIn PDF document text
    • https://cdn.sqhk.co/derebeduno/cfgigjP/earthbound_halloween_hack.pdfIn PDF document text
    • http://itravelgr.com/garmin_gpsmap_78sc_sd_cardxjcnh.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/cjjMLl1/migoxudekewufuzirubalapad.pdfIn PDF document text
    • http://lady-bug.club/18336487215b21tp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5dd072f-87bb-4ab9-b27d-816ff6d34319/vunawefapigaboliputiwil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def85b24-048c-4b4d-9e90-7432257dc0e8/9839330938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4128cf-b203-4b47-b6c8-ae9d9d55961c/23060486325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ac4f7d-8dc3-449e-bf31-543377c97769/136083229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c4bb7b-28c4-411c-b239-d778431f0fbd/xowajimevafoteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868cc38e-de35-4bd4-a442-66faf5a0ce76/acordes_de_piano_canciones_cristianas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94d5cdd-9fd7-4373-b021-74653e81ae3e/52242457482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cca030-4bb6-4e01-83a4-3580d9fa2651/classical_guitar_strings_tension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d1b891-ce07-43e1-8000-168cf7fc397c/78986323190.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 5292 bytes
SHA-256: 80693835fe8ee3883ff8bdf6d00d7ac5e2dc71b48755a86eab7ce8ba95bed41a
font_01_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 12396 bytes
SHA-256: b7270f448f54b3b7dcd0bd6db5997a7f1c776045ef4a7cc1cf46192d270bc6aa

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