Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15aaffd75f17ed9…

MALICIOUS

PDF

73.8 KB Created: 2021-04-16 19:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46a2942bdd0c7ce01f8c8b80ff4d038e SHA-1: 2abadaf136038637968b39d65f69f848d69e6c13 SHA-256: d15aaffd75f17ed9a21d88eeb314cfd8615ef83de9fa46538422836e5f4817f0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://jumiwimov.ru/strik?utm_term=what+does+rotational+kinetic+energy+depend+on', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, potentially masking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=what+does+rotational+kinetic+energy+depend+on
    • https://static.s123-cdn-static.com/uploads/4381751/normal_5fe1a1e5c44cd.pdf
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/tulimunipene.pdf
    • https://cdn-cms.f-static.net/uploads/4481397/normal_605204c7dc11b.pdf
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/dolazijerosa-mapologole.pdf
    • https://cdn-cms.f-static.net/uploads/4378378/normal_60342ed39e125.pdf
    • https://rumirasikimuzib.weebly.com/uploads/1/3/2/7/132710795/0661bc0.pdf
    • http://didifofovura.iblogger.org/nugodusejumaba.pdf
    • https://bolamowoxuwev.weebly.com/uploads/1/3/3/9/133997192/wutixev.pdf
    • https://gimezoribetigaw.weebly.com/uploads/1/3/4/6/134676461/c7c0cd0e0c.pdf
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/guwovubuxoj-kefasa-bakekosubize.pdf
    • https://rudanivaxaf.weebly.com/uploads/1/3/4/4/134497940/zesob.pdf
    • https://static.s123-cdn-static.com/uploads/4420764/normal_5fe38cabb6870.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://deriwamunul.rf.gd/xatusuxojalafurun.pdf
    • https://uploads.strikinglycdn.com/files/2b782bfa-cc74-4b7f-b085-742fe2f171a5/65583685962.pdf
    • http://fozijasorizol.epizy.com/49875700687.pdf
    • http://fugiwebagatikog.rf.gd/business_corporations_act_ontario.pdf
    • http://tubulufegufixo.rf.gd/50823074716.pdf
    • https://uploads.strikinglycdn.com/files/fbc29eb8-3ab9-405c-b6c5-3fc3ed8dcc4a/80526322672.pdf
    • http://wevikokuzufos.epizy.com/android_yahoo_mail_app_push_settings.pdf
    • http://goxunizitemowu.rf.gd/mafitexulogapoxizuruzapu.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_off0000df7e.bin
93ac6ebb6e5125946a8abc3c16a1142427412de63f8e1161bd0bd1eca450913e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 5512 bytes
font_01_sfnt_off0000f24a.bin
cb14b06a99d81df7c9e6cba4a7e09bcd1b165ea0176250d841b723f3fcc8365e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 11528 bytes