Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec2b4ea14488a3b…

MALICIOUS

PDF

62.9 KB Created: 2021-04-04 22:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 241372cdf7f9ecda436c272f63f7d46f SHA-1: 6a2342bb9f07d86a32c8a2627fecca649bc053d7 SHA-256: 1ec2b4ea14488a3be88c59af860445049fdfcbc5aeac52a2b047df7e02f3a322
124 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics suggests the PDF is intended to redirect the user to a malicious website, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8308

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
  • 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
  • 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://ponafet.ru/strik?utm_term=cradle+to+cradle+chapter+4+summary
    • http://zepawagir.iblogger.org/tadodisew.pdf
    • https://cdn.sqhk.co/letinumi/XhbRjfN/ice_cream_van_song_south_africa.pdf
    • https://cdn.sqhk.co/bopelara/aVhbpeH/fokobow.pdf
    • http://zekabor.iblogger.org/prefix_root_suffix_list.pdf
    • https://cdn.sqhk.co/nojebimit/jieif3v/adidas_x_star_wars_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mejigavukolu/69722513034.pdf
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_2d187eee385f40298f94be832ee41e1d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0d5cb5c9-1f84-4ee0-9d10-fc71d6092c02/helter_skelter_book_amazon.pdf
    • http://niguroxutoginef.rf.gd/mr_heater_big_maxx_80_000_btu_reviews.pdf
    • https://uploads.strikinglycdn.com/files/af818cef-f08f-4a53-80c9-6f006b76df49/suxel.pdf
    • https://uploads.strikinglycdn.com/files/f1a6a25e-d9b4-47e4-aa6b-1e13233d209a/19476870510.pdf
    • http://mafovito.rf.gd/kijuket.pdf
    • http://giwoxig.rf.gd/73071483561.pdf
    • https://s3.amazonaws.com/veraxawewib/edgar_allan_poe_tell_tale_heart_literary_devices.pdf
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_15c10d51133943e9bcf8ca1267bc67d0.pdf?index=true
    • http://lokanubuxona.rf.gd/professional_web_templates_for_business.pdf
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_97446907701e441c88eb9ccb88c03560.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7b.bin
8451bc6a34ee63939b6bf52bcccfc00dfb5c6e8a8db4f42bad8bd452d49038ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 5408 bytes

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