Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f206325b485f83…

MALICIOUS

PDF

77.4 KB Created: 2021-03-30 09:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ee05ba7c44f44faf3e7990e8b58ac77 SHA-1: 776e07173fd86d7b1983a2831c2287f813e6eda7 SHA-256: 47f206325b485f83ee04424ea83a3d25bc69e918d1ad5fb8e0ad8190aa178e6b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights the use of link farms on disposable hosting, reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=accounting+standard+30+pdf
    • http://creditscorefix.info/how_to_change_ink_cartridge_on_an_epson_wf-263023xc3.pdf
    • http://tikanaw.mypressonline.com/banorolopozaj.pdf
    • http://tijudozi.scienceontheweb.net/44248255678.pdf
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/7b52bea6.pdf
    • https://mubafuzolifuben.weebly.com/uploads/1/3/4/6/134644730/wufosikelonevawerosa.pdf
    • http://xovebud.mygamesonline.org/ielts_speaking_topic_list.pdf
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/zizunejesax_xovukakoxox.pdf
    • http://freedate18.xyz/321404137400u24j.pdf
    • https://tapojanez.weebly.com/uploads/1/3/1/3/131398133/pumuvisinigarabaw.pdf
    • https://mizinunebij.weebly.com/uploads/1/3/4/6/134660950/benex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c80553d4-bb66-4d98-b043-7cf60429900f/how_to_play_orks_kill_team.pdf
    • https://uploads.strikinglycdn.com/files/df315974-a401-443c-b7d4-41bfab6ccccd/what_is_computer_ict.pdf
    • https://uploads.strikinglycdn.com/files/d170db6e-bd8c-4544-a571-cdde9bb1635d/bunimemawewudizidise.pdf
    • http://tojuzogip.myartsonline.com/vinabatapagadev.pdf
    • https://uploads.strikinglycdn.com/files/f03e8f9c-8587-4234-a415-c4b79d77ab4c/lawasuvijadunezagupidolad.pdf
    • https://uploads.strikinglycdn.com/files/fdb1ea78-a325-490d-bbb8-4231d6b973cb/the_hunger_games_mockingjay_part_2_full_movie_download_in_hindi_300mb.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_off0000f26c.bin
099c9d19d5de458f2c92bf593a25a9a9bbc633b2fefaa6d1837327cab57c2ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 5588 bytes
font_01_sfnt_off0001057b.bin
27a62aa76843ec11d75a7a433703adfcc53fd05bc87d4f0e5ce476fd383cb143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 10228 bytes

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