Malicious PDF — malware analysis report

Static analysis result for SHA-256 953e3baacbeecd3b…

MALICIOUS

PDF

77.4 KB Created: 2021-04-01 18:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb7a1072a4c2fbc033445cca49af46ea SHA-1: b8cb5ceae404ed79735d9636f122b92d7c307ec6 SHA-256: 953e3baacbeecd3bb6d4c32a15a9d7c4a9a7641c4397844fbfe18c398043c147
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'dafemum.ru', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=online+games+to+play+with+long+distance+girlfriend
    • https://cdn-cms.f-static.net/uploads/4476939/normal_60527031c6d21.pdf
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5fcf04e59565c.pdf
    • http://discovljzg.fun/test_inteligencias_multiples_para_nios_primariapva5n.pdf
    • https://static.s123-cdn-static.com/uploads/4383806/normal_6006a70f22306.pdf
    • http://world-wildshop.com/293789195435lyuu.pdf
    • http://gogadozuxigode.iblogger.org/fogedabafitot.pdf
    • https://static.s123-cdn-static.com/uploads/4420018/normal_6000f650191b3.pdf
    • http://euroshopmn.space/nalafijoubfly.pdf
    • https://cdn-cms.f-static.net/uploads/4413226/normal_604a84af16308.pdf
    • http://50offit.pro/18942697072vhb7s.pdf
    • https://cdn-cms.f-static.net/uploads/4494681/normal_605ef8439a118.pdf
    • http://opensol.xyz/xotic_ep_booster_that_pedal_showu9gmt.pdf
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5ff5161d8aa4b.pdf
    • https://static.s123-cdn-static.com/uploads/4383804/normal_5fffea6ef1d4d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sapeduz.epizy.com/vanguard_asset_allocation.pdf
    • https://s3.amazonaws.com/siwixomudit/sony_playstation_vita_slim_for_sale.pdf
    • https://s3.amazonaws.com/vibasujefir/12129002146.pdf
    • https://s3.amazonaws.com/bevarolimesale/lapafako.pdf
    • https://s3.amazonaws.com/lazesej/robapofamuwise.pdf
    • http://peribigitakazar.epizy.com/english_grammar_basics_free_download.pdf
    • http://jitoritobo.epizy.com/6299517463.pdf
    • http://pakekaririwofas.rf.gd/lewaminifu.pdf
    • 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_off0000ef81.bin
2c3765786583bcbe53afa15c7bfcf1bbdcbce66bef384423a696df9de810a7f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 5788 bytes
font_01_sfnt_off00010326.bin
2ef7f538a8a7666a8474feb8069a1c56b1ade5e5357afae66aff37b71546b959
pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 10788 bytes