Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2443316afd9090…

MALICIOUS

PDF

172.1 KB Created: 2021-04-26 19:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 351046f528c68d9c6c7951fe97d21276 SHA-1: c43f007add38ad93c68f49fd892ecf87015e5f79 SHA-256: bd2443316afd9090dd53ce3ab1b293426822248db4a750c71b4acbf802998373
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=dnd+5e+spell+crit
    • https://cdn.sqhk.co/dukapudubi/Yhdpugd/wupoxizikagetexezufip.pdf
    • https://cdn.sqhk.co/vefutifeves/hj7wDCb/mugarogisojowubok.pdf
    • https://cdn.sqhk.co/bikakigiben/lnsgdND/zikakenubawiret.pdf
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fcf968b4b54d.pdf
    • http://palopej.sportsontheweb.net/conjunctions_paragraph_exercises.pdf
    • https://cdn.sqhk.co/kavatupopum/yggmhcW/28863923560.pdf
    • https://cdn.sqhk.co/gusisitixinu/vibDha7/striker_soccer_brazil_download.pdf
    • http://zijozarub.mygamesonline.org/52680737811.pdf
    • https://cdn-cms.f-static.net/uploads/4485696/normal_60628050372cb.pdf
    • https://cdn.sqhk.co/pagifizipafo/ajgBcSR/12547402976.pdf
    • http://roxelejabojafe.scienceontheweb.net/26263165368.pdf
    • https://cdn.sqhk.co/ludozenidi/P0ZDhgz/sport_events_in_barcelona_this_weekend.pdf
    • https://cdn.sqhk.co/junikesiza/bGGqtnL/motogp_coverage_channel_10.pdf
    • https://cdn.sqhk.co/jututumogu/igmggia/bifurefigipedulunukubufu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rijonitapadon.myartsonline.com/pasotevuvino.pdf
    • http://femejedad.epizy.com/samevudelodujafase.pdf
    • https://s3.amazonaws.com/risalenefazozo/lodukogogopewixomab.pdf
    • https://s3.amazonaws.com/ronenitevodo/78268854403.pdf
    • https://s3.amazonaws.com/tanikanaw/cardiogenic_shock_treatment.pdf
    • https://s3.amazonaws.com/vojapu/87903512091.pdf
    • http://linexiziretewoj.rf.gd/riribolepolalebefavom.pdf
    • https://s3.amazonaws.com/joterige/pdf_file_viewer_app.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_off0002692d.bin
13aec8b67f28af45cf8881867c9c1493de26797d5f2de5419294da20104823d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x2692D 4980 bytes
font_01_sfnt_off00027a35.bin
b2218b7fc5ee2f9ad34ee41c0f66246878db8f5e27bbe7a90621d9b7c9c14fb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x27A35 11788 bytes