Malicious PDF — malware analysis report

Static analysis result for SHA-256 5893a5dd71b128d1…

MALICIOUS

PDF

57.2 KB Created: 2021-04-03 16:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e94a1b5b0c8222d0b7ee73f804448e SHA-1: cb1c2e35412d53e4ccdf144e75575006754abee0 SHA-256: 5893a5dd71b128d10af72141bacdeeddf13271b5c1b13bdca5f89842d1e5c1b4
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The embedded URL is designed to trick the user into downloading a potentially malicious file. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7237

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/award?keyword=precalculus+mathematics+for+calculus+solutions+pdf
    • https://cdn-cms.f-static.net/uploads/4473637/normal_60659e0d86c81.pdf
    • https://cdn-cms.f-static.net/uploads/4405420/normal_603acefe59411.pdf
    • http://usesucre.pro/science_without_religion_is_lame_meaning_in_telugusuvci.pdf
    • https://cdn-cms.f-static.net/uploads/4493569/normal_6048a9fd2593e.pdf
    • https://static.s123-cdn-static.com/uploads/4390329/normal_5fe3c96485856.pdf
    • https://cdn-cms.f-static.net/uploads/4404733/normal_600e69f220b71.pdf
    • https://cdn-cms.f-static.net/uploads/4530578/normal_604f02629a5aa.pdf
    • http://gbo.guru/how_to_calculate_estimate_in_civil_engineeringtao5m.pdf
    • https://cdn-cms.f-static.net/uploads/4460963/normal_60342ab18e3a2.pdf
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5ff49918d2f96.pdf
    • https://cdn-cms.f-static.net/uploads/4447086/normal_606230368a38c.pdf
    • https://cdn-cms.f-static.net/uploads/4450889/normal_60368c54bf918.pdf
    • http://xufelaketodo.getenjoyment.net/tegelukajevapavezabek.pdf
    • http://meetsucre.pro/rerilekuzemunalerefukegfnre.pdf
    • http://dalifajebuxog.scienceontheweb.net/55627903133.pdf
    • http://prizinsta24.online/why_is_the_windstorm_significant_inmn631.pdf
    • https://static.s123-cdn-static.com/uploads/4369343/normal_5fc94a981e73a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fosawef/how_to_format_laptop_and_install_windows_7_step_by_step.pdf
    • https://s3.amazonaws.com/zupenafud/how_to_setup_samsung_xpress_m2026w_wireless.pdf
    • http://jifisuxevizek.myartsonline.com/67474809522.pdf
    • https://s3.amazonaws.com/gateme/xisiworedonoreresubumos.pdf
    • https://s3.amazonaws.com/kubedukowug/wujan.pdf
    • http://suduxegowur.onlinewebshop.net/corning_cookware_worth_money.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c649.bin
de9933521dea96fe2ac712cfd529b974e7ad6a8e3c851271f20233f6a55ac826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC649 5396 bytes

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