Malicious PDF — malware analysis report

Static analysis result for SHA-256 0431406622e0ed3e…

MALICIOUS

PDF

73.2 KB Created: 2021-03-29 17:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10b90d1f797ed953b480fd581018be28 SHA-1: 2fea9a004bac780701d81108d50df8cdea112aba SHA-256: 0431406622e0ed3ed9fc14df88fe2e0aa0ec396877b8d1b34990637cc6afd24b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The document body, though heavily obfuscated, appears to contain metadata related to the URL's keyword, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=fo76+possum+exam+answers
    • https://cdn.sqhk.co/gixekoji/m3ihicQ/fun_facts_about_mercury_retrograde.pdf
    • https://cdn.sqhk.co/temududote/vghTijg/vekofimonediwexoradajov.pdf
    • https://cdn-cms.f-static.net/uploads/4426695/normal_605f48572c1da.pdf
    • https://static.s123-cdn-static.com/uploads/4375361/normal_5ffce022b6b23.pdf
    • https://cdn-cms.f-static.net/uploads/4377909/normal_602b460291d05.pdf
    • http://ziwigosopijulal.mygamesonline.org/russian_formalist_theory.pdf
    • https://cdn-cms.f-static.net/uploads/4475016/normal_6051c96ac0998.pdf
    • http://sugameloxufe.mywebcommunity.org/45441641983.pdf
    • https://cdn.sqhk.co/jewimebobi/8jXzijV/71775781334.pdf
    • http://vojemodipu.sportsontheweb.net/384312771.pdf
    • https://static.s123-cdn-static.com/uploads/4367633/normal_5fe10934173a4.pdf
    • http://ralugugifoxatir.scienceontheweb.net/texibodabelofenawuresa.pdf
    • https://cdn-cms.f-static.net/uploads/4392660/normal_601052655c669.pdf
    • https://static.s123-cdn-static.com/uploads/4450640/normal_5ff15c1b5e116.pdf
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5fe61f76f060f.pdf
    • http://bunutib.mywebcommunity.org/pupewilazawevape.pdf
    • https://static.s123-cdn-static.com/uploads/4404287/normal_5fefe0357c80a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://suvalomimo.atwebpages.com/pexitot.pdf
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_e0d914e5b4744d4cab24968f0c0f45cf.pdf?index=true
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_17afb8592b5d4e6da8bfc9f29ca70194.pdf?index=true
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_afd4f004bec845e48d427af1d3e655c8.pdf?index=true
    • 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_off0000e1a9.bin
e597107591e60681973c29589ac8f602780a4b5abb53810d1411022ef93c500c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 5280 bytes
font_01_sfnt_off0000f3a6.bin
d3ec13fa343c2fe4d2f9607356c12c768b1ac6b0276fc46d6bf8bf3d6be13c40
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 10524 bytes