Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3e75a348df08b2…

MALICIOUS

PDF

63.8 KB Created: 2021-09-14 02:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ee9e0785d8eea4aa6a1d4ad21be5aeae SHA-1: 4b701e27623ad158d14222940fc580dbfcab0bd2 SHA-256: cb3e75a348df08b2a5f811bcb611f7957a53aa03151afba9d1f440c699595aa2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pixomot.ru/uplcv?utm_term=wild+rift+league+of+legends+apk PDF link annotation
    • http://lex.tj/img/file/gatukoletadejotibaputak.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/90568014006.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/moxozajuw.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/51950089772.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/mubapotufanurixezakowoz.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/polodolawu.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/56047280301.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/7792960906.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/xowinodifatawa.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/36680712305.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/64673160505.pdfIn PDF document text
    • https://limsurempat.com/contents/files/50445057083.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/5509793020.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/7080075564.pdfIn PDF document text
    • https://rippa.pt/files/file/bomititoliru.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/jolofowupirivedadefutaxak.pdfIn PDF document text
    • http://linza-market.ru/upload/files/bedivonu.pdfIn PDF document text
    • http://medica-brno.com/files/wuwen.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f859d7e833---88273332299.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/73079327334.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/gorifinipipukekewitikowuz.pdfIn PDF document text
    • http://cutskytools.com/d/files/ramuvakupe.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/48881102988.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 10860 bytes
SHA-256: 142956e98fa067a1f5c4d0f580352b12bc686c53170db15d3b87302837e42f00

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