Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce719a2b2e67b901…

MALICIOUS

PDF

68.4 KB Created: 2021-09-21 02:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d6b522be85cc73bdd5ea4f2d574f914e SHA-1: c060589b355206bd98100050931bc38fb0e7736c SHA-256: ce719a2b2e67b90195e0c2de6f22121d0f4b2474ca31909b1c941dd0702938ba
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 hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7780

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
  • 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://queure.ru/uplcv?utm_term=auto+yardie+gta+3 PDF link annotation
    • http://lifecontinues.ru/images/files/bazajelotesafix.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/86216977689.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/51113027346.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/bemusonawegakevalexu.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/97175454405.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210902014821.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/67046085871.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/mavopibofomuxinawapekud.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/22931462643.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/fujuxekewif.pdfIn PDF document text
    • https://penzion-palice.cz/content/zizewinor.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/4586481035.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/48680737614.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/96112422314.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16147752ac8daa---34546307822.pdfIn PDF document text
    • http://yoron.net/up/files/93068667539.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/jafetiriju.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/62843941891.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/mofomobug.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/96970632629.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/nukijupolajiti.pdfIn PDF document text
    • https://redac.ch/upload/34679296087.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_off0000e26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26F 10472 bytes
SHA-256: f6494fc1ab3a971bfbfe0edfc242991bd97c591e9017e2a4ac5860b4c39446a5