Malicious PDF — malware analysis report

Static analysis result for SHA-256 885c3415e4a89191…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 05:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bba5d72e6ae072c0d7c918d3cb5ce535 SHA-1: d4edd382ad0e9a2d5d9ffd43f056c1a52960e507 SHA-256: 885c3415e4a89191537c54d501621b0aa0321298d7eaeb7f9c31e33714fa1fe0
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to zajinet.ru, which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a book summary, aligning with common social engineering tactics. No scripts were extracted, but the presence of external URIs and the malicious verdict strongly indicate an attempt to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=mearsheimer+tragedy+of+great+power+politics+summary
    • http://taher-tcac.com/arp_protocolufxwv.pdf
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/tukinazum_judusuxosa_roxunovilu_xebuges.pdf
    • https://gokulibom.weebly.com/uploads/1/3/4/2/134266198/d2839ecd198240.pdf
    • http://zogeditel.iblogger.org/hidroxiurea_anemia_falciforme.pdf
    • http://gijixig.22web.org/87871151317.pdf
    • https://cdn-cms.f-static.net/uploads/4426954/normal_60484a333da18.pdf
    • https://cdn.sqhk.co/pawekenu/5heThe6/paper._io_2_hack_tampermonkey.pdf
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/2239005.pdf
    • http://securityverifiedservices.com/92246363016yiw3e.pdf
    • http://sewonmedix.ru/80992172173tsxjg.pdf
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/49767.pdf
    • https://cdn-cms.f-static.net/uploads/4476418/normal_6029963d2c035.pdf
    • https://cdn.sqhk.co/rawerusiwala/Yhjhagd/stampede_reservoir_fishing_regulations.pdf
    • https://cdn.sqhk.co/zobunifi/hf4icja/guide_2k20_among_us_tips_advice.pdf
    • https://cdn.sqhk.co/voxoduvi/L2gKhe1/snow_bros_cheats.pdf
    • https://cdn.sqhk.co/gixixutiji/fOXhjNE/bluestacks_for_pc_windows_10.pdf
    • https://cdn-cms.f-static.net/uploads/4479474/normal_5fe9298bda723.pdf
    • https://vezaruve.weebly.com/uploads/1/3/1/3/131378950/d20090d7e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jogebupirenewid.rf.gd/57941963380.pdf
    • http://tavudedenudisuj.epizy.com/sherlock_holmes_part_2_full_movie_in_hindi_download_480p.pdf
    • http://tabifewegijip.epizy.com/departmental_organizational_chart_template.pdf
    • http://xasaduditomup.epizy.com/quartz_uses.pdf
    • http://wumiwumo.rf.gd/what_are_tools_of_grounded_theory_in_qualitative_research.pdf
    • http://xaxibalese.epizy.com/28104122327.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_off0000f58a.bin
bcc6394147bd8c9137bcca3dbaf831b9282f0cb705485a789eb4966edf5169aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 5768 bytes
font_01_sfnt_off00010933.bin
d660e0f8308540290959edad1e6845b565131e1f13d9a7787f0f4b36d7d1a168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10933 10852 bytes

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