Malicious PDF — malware analysis report

Static analysis result for SHA-256 339c3d582a1dbe22…

MALICIOUS

PDF

136.5 KB Created: 2021-03-15 18:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2789203132bab1a3021861b3d0779a5a SHA-1: d2b398caee170446bd1a8b0ba379c705cfbd9f13 SHA-256: 339c3d582a1dbe22fa8bdcd3284617d9275877ac4d20b3dc06baa2aaaacd2f6f
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain that appears to be a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URIs suggest an attempt to trick users into visiting a malicious site, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9334

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://midufefew.ru/award?keyword=antigone+modern+translation+pdf
    • http://vimebadu.22web.org/34731152930.pdf
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5fe140499523b.pdf
    • http://fesuzeroba.iblogger.org/biomedical_informatics_pitt.pdf
    • https://cdn-cms.f-static.net/uploads/4477181/normal_5fea1729b6bb5.pdf
    • http://kewatupu.scienceontheweb.net/i_wanna_iguana_persuasive_writing_lesson_plan.pdf
    • http://jolowenifar.iblogger.org/53809839287.pdf
    • http://gejudoxe.mypressonline.com/27453965403.pdf
    • http://kamefutebiwef.mywebcommunity.org/horus_heresy_novels_siege_of_terra.pdf
    • http://mopexaxurip.getenjoyment.net/57820629832.pdf
    • https://cdn-cms.f-static.net/uploads/4368466/normal_60349a7da1259.pdf
    • https://cdn-cms.f-static.net/uploads/4447278/normal_601ac50ba4b1b.pdf
    • https://cdn-cms.f-static.net/uploads/4462694/normal_60250b91e58e3.pdf
    • http://vexetifiridik.mypressonline.com/american_english_language_learning.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kiroxivox.epizy.com/battlefield_1_pc_code.pdf
    • http://vexabimumemig.atwebpages.com/gilus.pdf
    • http://bulegenarofil.epizy.com/curso_de_arcgis_10._5.pdf
    • https://f8bd9030-4518-40b4-9047-d478e6ffc17b.filesusr.com/ugd/608fe2_b4a99f8d74944b9d8c718cc333e6f84e.pdf?index=true
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_fcab1650dc504c66b28abe530b06e3ef.pdf?index=true
    • http://rufopanapoxo.rf.gd/90232854186.pdf
    • http://lepefefila.epizy.com/facsimile_transmission_cover_sheet_los_angeles.pdf
    • http://bumilamufitilu.epizy.com/88085241227.pdf
    • http://gowuzabe.epizy.com/vaxaxedowitevifedexawi.pdf
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_8e011c49133f4486813d11d5c9a914f9.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002095f.bin
9debcaaaa4b895e3f939629ae0bd125402ead7a5a8d868bc8ebccf8376e673cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x2095F 5348 bytes