Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc47323c2c2c8462…

MALICIOUS

PDF

80.6 KB Created: 2021-03-20 17:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9a25d9bf675e3a83b6984f4654a3609 SHA-1: ec4116ce9457db5de1e91b0d0a0e11a2b54d6bdd SHA-256: fc47323c2c2c846278e9c77d6f70b1584708992813f1829631f305f0646b7e33
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution scheme, likely using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://botokaw.ru/aws?utm_term=ipazzport+bluetooth+mini+wireless+keyboard+for+apple+tv
    • http://dfahsdfgjsfg.online/95325563636zja1q.pdf
    • https://kokazokurazafan.weebly.com/uploads/1/3/5/3/135348127/puvokipaxuvuke.pdf
    • http://top-salez.site/14094997524d4vt6.pdf
    • https://cdn.sqhk.co/dedomafub/ihjve3z/27229005824.pdf
    • https://cdn.sqhk.co/dijabidasu/vwjhejf/absolute_rc_heli_sim_hack_download.pdf
    • https://cdn.sqhk.co/vetejevibas/fOyjjRk/grey_literature_simple_definition.pdf
    • http://criticcxck.space/500055031778rnat.pdf
    • https://cdn.sqhk.co/luzigagoguna/I7Xiggg/kingston_coin_op_laundry_san_bernardino_ca.pdf
    • http://ipatovaalena.ru/video_player_download_for_macvzh8b.pdf
    • https://cdn.sqhk.co/jenetuwuda/50qjihR/17650885917.pdf
    • https://cdn.sqhk.co/defisepeniba/fpWijBt/taipei_metro_map_english.pdf
    • http://hhizmet.com/wamuwadumidmw140.pdf
    • https://cdn.sqhk.co/xiroxozalal/aHheDjc/fapazaperikexowe.pdf
    • https://vipobonufemug.weebly.com/uploads/1/3/5/4/135401160/1d1a38fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c63f1186-f6d1-4aa2-bf2b-5b647440aa74/can_i_get_a_car_inspected_before_buying.pdf
    • http://faxunininenif.epizy.com/dajowixalipekuput.pdf
    • http://lamujep.rf.gd/74950014992.pdf
    • http://gotenekopibijo.epizy.com/medical_ethics_multiple_choice_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/39521ab7-7e63-455a-a985-096c67c397b7/logo_design_ideas_for_business_online.pdf
    • http://wawefib.rf.gd/html5_cheat_sheet.pdf
    • http://fopagozijudiri.epizy.com/66401315770.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef85.bin
5226c763f3d4f3cbceb38bcb13217c6b3d4a8982263ccab1e51df51dbcfe70e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 2900 bytes
font_01_sfnt_off0000f9da.bin
0bfcc3f5f1a5a8cbf9da8f3c3b538055ea050505226b2755ec5caedc4d9c846c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 5724 bytes
font_02_sfnt_off00010d42.bin
88424b3f5934b00f00830ee8be4d84805c38d6a0746e0870d36b7cd4705bc171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 10772 bytes

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