Malicious PDF — malware analysis report

Static analysis result for SHA-256 9096aa94f3facf6e…

MALICIOUS

PDF

87.7 KB Created: 2021-09-21 16:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8ce99e635c931d4995187e6dc7ce7dfc SHA-1: 674898c20d127e91d92c9e37f61e7204b131a517 SHA-256: 9096aa94f3facf6e5b9c1c0605bd92d592a1bb99e14bfdb8121c9a276d2fe2b3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the PDF structure and URL distribution point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

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://archism.ru/uplcv?utm_term=boruto+episode+105+english+dub PDF link annotation
    • https://immobiliareincentro.it/allegati/file/dajupisapivavufok.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/koselimowo.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614203bd16c36---mowetifajikola.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/17661128167.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021913846504980.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/38516814171.pdfIn PDF document text
    • http://recviem.ru/img/upload/24479480020.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/lolenirukegivad.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/fosubofapul.pdfIn PDF document text
    • https://www.renouer-auxerre.com/ckfinder/userfiles/files/midefolife.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/83596920484.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfacd7165d---28134326227.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/ritirefeseresiderebar.pdfIn PDF document text
    • http://arucax.am/user_images/file/82426239169.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/rasajazizutogebox.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/bawuveripenunu.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/kizalupowaxasisuxiba.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/38903125834.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/bojelapipabugisetavagofol.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/99625583521.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/3203536770.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/84388211936.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_off000140a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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