Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba6965ed2520d5f…

MALICIOUS

PDF

81.0 KB Created: 2021-04-24 10:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa28b057847a464a7069748d9c3d18c4 SHA-1: 83dff25b5676aa7d08d9819883eb2d05c7a4e2e0 SHA-256: 7ba6965ed2520d5fd3a0fb65087f72b50eee8f0025eeb006230c4a7fd1c2a5c8
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple detection engines, including ClamAV and an ML classifier. It contains a large number of embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm for SEO manipulation or to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 5

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://druttle.ru/strik?utm_term=night+owl+optics+5x50+nob5x+1st+generation+night+vision+binocular+%2528blue-black%2529
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/rodoj.pdf
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/mawefavedon_badekulos_jonajerabe_runokoleforivux.pdf
    • http://joxitikoki.getenjoyment.net/causes_of_bone_marrow_failure.pdf
    • https://xorodipilubila.weebly.com/uploads/1/3/5/3/135311864/tanizaduweb.pdf
    • http://xoziduso.mypressonline.com/how_much_is_a_kindle_fire_hd_7_worth.pdf
    • https://xepawonim.weebly.com/uploads/1/3/0/7/130776577/5ba49.pdf
    • https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/bonuwasafep.pdf
    • http://lonotel.mygamesonline.org/32596521921.pdf
    • http://rasipafus.getenjoyment.net/above_all_chords.pdf
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/5122c3a9655f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://namepafubi.atwebpages.com/winojarufiseno.pdf
    • http://sukokovevaz.atwebpages.com/56564655075.pdf
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_6deec2d47374440dbeac93f599042c6a.pdf?index=true
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_2bdd25d464274d50b5e541486d89afb0.pdf?index=true
    • https://s3.amazonaws.com/sedimeraxufi/justice_league_unlimited.pdf
    • https://s3.amazonaws.com/xifabilejilab/fingerprint_attendance_system_using_arduino_project_report.pdf
    • https://s3.amazonaws.com/lakujusitejojet/bubble_shooter_mania_game.pdf
    • http://nibemodida.myartsonline.com/gizuk.pdf
    • https://s3.amazonaws.com/regegozumekoza/82131026416.pdf
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e9.bin
8fb69ac46380864b56a0532093e82611ec18ecd63f17dd542376ab435aecfd91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E9 5976 bytes
font_01_sfnt_off0000f878.bin
47e59d29a80ff74a487f3c2fb3df3acc1f2e36b07242918d745136d126e5da24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 11072 bytes
font_02_sfnt_off00011e89.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 16164 bytes
font_03_sfnt_off0001339e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1339E 4324 bytes

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