Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b57431f4e690a9…

MALICIOUS

PDF

75.8 KB Created: 2021-03-14 07:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7248d3c23cfbd6d203a5183e54a313dd SHA-1: d23735728cad12db0811692ff7aeb29c1bb1bbd3 SHA-256: a4b57431f4e690a9d481f8acc2d0634e94744599ac865dba148e6d9cb208552e
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL, likely intended to trick the user into downloading a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple external URLs suggests a phishing or credential harvesting attempt, disguised as a document related to a scanner service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://botokaw.ru/strik?utm_term=scansnap+s1300i+scan+to+email
    • http://romeita.space/nawovomavonug549l.pdf
    • https://tejaxoxujita.weebly.com/uploads/1/3/4/3/134368030/f24ef.pdf
    • https://cdn.sqhk.co/foroboreb/jhgghf9/demuberatufuxomevapi.pdf
    • https://wenajatimox.weebly.com/uploads/1/3/4/4/134480159/xuvuzemipis-kimeja-pajakumanivuza.pdf
    • https://cdn-cms.f-static.net/uploads/4493610/normal_601587f828c2e.pdf
    • http://aslixan.com/witupaxuzoxujabela5s2n6.pdf
    • http://kejumazinanu.mywebcommunity.org/activated_carbon_msds.pdf
    • https://cdn-cms.f-static.net/uploads/4459624/normal_5fdbd690ae75e.pdf
    • http://xofebuledat.scienceontheweb.net/36005535595.pdf
    • https://rukifutotusiz.weebly.com/uploads/1/3/4/6/134685592/gegof.pdf
    • https://cdn-cms.f-static.net/uploads/4453528/normal_604b346831c8d.pdf
    • http://kinoogf.space/95238254462toscl.pdf
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/4741fd4.pdf
    • https://cdn.sqhk.co/mozopojugode/UVgdifW/vodagegaxulukiwalug.pdf
    • https://cdn-cms.f-static.net/uploads/4366367/normal_604d6881b06e2.pdf
    • http://fefiwizam.sportsontheweb.net/nimixeviw.pdf
    • http://vlada4.xyz/download_kiko_run_mod_apk_androidbu8jz.pdf
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/bukonuwewos-dizireboki-xukibuxeketem-xebijunoputateg.pdf
    • https://cdn.sqhk.co/lilaxikixo/zryFjgF/53010269552.pdf
    • http://doordash.link/252922309380724c.pdf
    • https://bitigufej.weebly.com/uploads/1/3/5/3/135337089/xadusovutobuxuxide.pdf
    • https://kekulewu.weebly.com/uploads/1/3/4/3/134398637/db76565.pdf
    • https://cdn.sqhk.co/tenalewi/jdMigxL/photo_to_video_maker_apk_for_pc.pdf
    • http://wutopezogegusi.getenjoyment.net/double_bar_graph_worksheets_7th_grade.pdf
    • https://static.s123-cdn-static.com/uploads/4465398/normal_5fff7d7bcf185.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejibokakar.onlinewebshop.net/73483136767.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_off0000e913.bin
4b37d35e09ef7ba9294c10768e07e0af441a86acaf63f2c2ac4a429a9278d071		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 5444 bytes
font_01_sfnt_off0000fb91.bin
60af6950ccae90ce68d8a884a3d117e83e41d14374c00a8cc180ef3a83e041ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 11240 bytes

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