Malicious PDF — malware analysis report

Static analysis result for SHA-256 463af4b2ccf2326b…

MALICIOUS

PDF

76.6 KB Created: 2021-06-09 02:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4a1df7289451173014272b06b7e6ce14 SHA-1: 28b3246a9466beceb3f2e3237cdd68e91860a6ee SHA-256: 463af4b2ccf2326b6e2ba0615cb339afd0cd2c9adedf100994cb03c8ae1ac91c
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL pointing to a site offering game downloads, suggesting a phishing or malware distribution lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of link farming on disposable hosting, further supporting a malicious intent. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious content within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://irlanc.ru/pbw?utm_term=pokemon+sun+moon+download+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386354/normal_601b635757f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5fd9992ddc6a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5fe6003637192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_603c700d1de74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzavofan.pbworks.com/f/best_paid_booter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5f4271-a52e-4abd-9007-4e915c074bb8/31793445276.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/que_son_los_postulados_de_koch.pdfIn PDF document text
    • http://garifukedako.pbworks.com/f/grandma_got_run_over_by_a_reindeer_2000_full_movie_free.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144419487/como_ganar_diamantes_gratis_en_free_fire_en_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4abcc82-76a4-4839-bf31-2f135dfd778e/francisco_el_matematico_2017_elenco.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144600903/vojopogititimuvodex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cea67e4-1613-4605-bc44-d6d81f9e03e2/iphone_backup_auf_apple_time_capsule.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/jafasefufifoniduxufuwowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e74a04-c599-4b76-b57c-1b2d34ad84df/libivorobiveteg.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/w/file/fetch/144905910/tamilgun_new_hd_movie_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD944 5128 bytes
SHA-256: bb66ce936a16a1b9334026db1bb877e9a16d534499fb1e68479e7711ed38f113
font_01_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 10764 bytes
SHA-256: 2bb072bd7eedae56e35d45342f0a4bb8e3be97430c103fa4b6f2c8e7daf06160
font_02_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 16336 bytes
SHA-256: a230e08b8387483fc047727edd720e3994a044cba9cd33801ddc1a2766bbe4f8

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