Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe7fb0abef806a3…

MALICIOUS

PDF

81.8 KB Created: 2021-07-14 10:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b7237dcaad03d7871cacd7057faade7 SHA-1: 0bf12729f56efc270785769395315c2ef70d2434 SHA-256: 1fe7fb0abef806a36d54f0975015f6bcc1d13b52287dcd944ed4c9077fdee11a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to phishing or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6258

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=pirates+of+the+caribbean+series+streaming PDF link annotation
    • http://bmsorganica.com/userfiles/file/nikisenozegigi.pdfIn PDF document text
    • http://chapelguild.com/images/usr/54876991090.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e59a99366---derijavutigibanizu.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/55623665559.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e4a8c4875---84569805503.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/31969e191cbd01d54774996a2342e34d/farotalemikevubota.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/55907784271.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e74f23460---69462038986.pdfIn PDF document text
    • http://ymy-tea.tw/upload/files/tukidogideto.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b4b985b97---61457789143.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/qbd0gjvt4rpghc9p8riotdn2nr/tiful.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8aee3cd2e0---71602833786.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873d660606c---kawigit.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/1bfb1901eb7a2e0e8662040f770498d7/22169728026.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/16648189092.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b209e4bef09---tifuju.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/e3214d3567aeb728c804192668059e3e/5103563933.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/33212868073.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/57480477853.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/4ca21c70deab572a09558a5c1f8fc9dc/13727883673.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/59dedf62059d2e3f6145d59f3dccb79f/79474595241.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/ziboxoviveforuv.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/mivap.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608338be3821a---noleguvitametofexexoxu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb73be2fe21---filaxorimewat.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 17264 bytes
SHA-256: 45a58f1427f03e91a41eb750b1f7b9dea12429b4be4ea2bb5290e4201c65c3d7
font_01_sfnt_off00012fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCF 10876 bytes
SHA-256: 9796ea8afa1b0ebcd67d85416e57cfb5b74f315040714d3dd388774e765f221f