Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d720362c5cb3b2a…

MALICIOUS

PDF

73.5 KB Created: 2021-02-28 06:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed02d0671f264d42a1719fec9f45e38f SHA-1: 99262beb209249f1d49a59198de2a8cfca4f5587 SHA-256: 0d720362c5cb3b2ae3e4ad1844aed4db078cf56a4098df4be73cf77354640c87
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to setting up voicemail, which is highly suspicious given the file's malicious verdict and the presence of numerous embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/123?utm_term=how+to+set+up+voicemail+on+nortel+networks+phone+t7208
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fff6f32a55ff.pdf
    • http://busimaderule.mywebcommunity.org/elementary_linear_algebra_howard_anton_chris_rorres.pdf
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5fee2c7bbcd7b.pdf
    • https://cdn-cms.f-static.net/uploads/4499656/normal_60116da337f1f.pdf
    • https://static.s123-cdn-static.com/uploads/4497695/normal_6004a26708fb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xijalovelokolep/75372556354.pdf
    • http://puvuvijafu.rf.gd/sakako.pdf
    • https://s3.amazonaws.com/fogibi/free_online_ppt_design_templates.pdf
    • https://s3.amazonaws.com/kisimujuk/1264514347.pdf
    • https://s3.amazonaws.com/sirilagewuga/wow_fangs_of_the_father_guide.pdf
    • https://s3.amazonaws.com/novifamigot/famikemap.pdf
    • https://s3.amazonaws.com/kumasala/kademevof.pdf
    • https://s3.amazonaws.com/feborobegibew/wuworofaxatuxab.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_off0000dfc7.bin
b0156fcf1d1db92ba84d0b78e35b96f8d54b030f788ed551e0731ed31fb3b00d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC7 5896 bytes
font_01_sfnt_off0000f3c8.bin
95e7022082fd9cf777c034e0826957c657156273c7b1b107a12134d88727f85d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 10732 bytes

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