Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec54cd3bf19ac260…

MALICIOUS

PDF

77.6 KB Created: 2021-07-21 15:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dd874e4beeda548983cbd2c2a184ca5d SHA-1: 6a4a83ba5121f438cf49e28253279376ac39d545 SHA-256: ec54cd3bf19ac260abab555d65f05066b52f67eb16a3b7e07bb7282be552cef8
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, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised websites, likely to lure users into downloading further malicious content. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces this malicious pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5355

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cc8c187a3---26777165563.pdf In PDF document text
    • https://beautyyaurient.com/editor_upload/file/21232419516.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073dac23b518---fifoxinodovasim.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/c8ae4e2a17395aa3da2c65c2d6c4a306/25620918137.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/d3908f53d054117947df9a2840cf0f10/zonubozogeseda.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/eff4213f4a1dbf0bc214dc3fd42847e1/58655478915.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/589b1rd669lruo02hi5m99lva6/getolaxaxofezorabusoro.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/37995579501.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/em3ej8vb6a8qnpi1ikhcg02m9p/40671340039.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/91241886788.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/busoxiwomededikaro.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5940f40db---4084705112.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210703023221.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ktkbsb55gur7s7o1fpq0ocn9u3/96220312048.pdfIn PDF document text
    • http://www.bandungmesin.com/file/gikedamovovorarevemipow.pdfIn PDF document text
    • http://soflcops.com/clients/83267/File/65677338003.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/vufizikepanonu.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/lixipozonumif.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/56052547658.pdfIn PDF document text
    • http://houselandia.ru/files/61707973982.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/ximokuzilazojabewa.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/7jespg6go6kqhp9ur4oanoj660/wejilew.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080507b68305---23756459588.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/giluxigumaranojukefafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=oak+and+ember+steakhousePDF link annotation
    • 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_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 10732 bytes
SHA-256: 5287f9362fdd8f2f1c8409e33954955d7f207fd2303d16d8367a3c0b9b6ccbc8