Malicious PDF — malware analysis report

Static analysis result for SHA-256 95516c60b5a2b55a…

MALICIOUS

PDF

70.3 KB Created: 2021-07-29 21:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5d2dc8e71e3f22f37f563026bac8822e SHA-1: 80054b3fd683302502277c06268a21a54980b75b SHA-256: 95516c60b5a2b55ad78c0308a0694974ab0cca5e9c373fa252a23cade93397de
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic findings strongly suggest this PDF is used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

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://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28d497fe5c---8893974922.pdf In PDF document text
    • http://meteosputnik.ru/userfiles/file/15130963490.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ed22b1772---jixeper.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/0c61a44be804bf0d3c13622d8eb330b5/68507582672.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/bebade.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd2910b2f5---rositoxibirafezam.pdfIn PDF document text
    • http://carolinaboatclub.com/userfiles/file/27830417324.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8a3a3d78a1fd5061bd7e39fb6366791d/93029073334.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/lataboxaxavo.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-2/20210502011915208608.pdfIn PDF document text
    • http://garderoba.sk/images/_file/gobuduwe.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d5c31478f---fogizewa.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/limolexulakovurivumig.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/j0426hsn1073cbrgfdse36v6e1/44669734948.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/vikumoj.pdfIn PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/javonuxunora.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d582682f3b4---26950277457.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/vezemolosejadoxizupozar.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a45d507bd3---xefuwujimozolupumubonukuw.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a186cd8be---bozetizegita.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcde8e4edec---motatigakirufusoxewolepiz.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/43105172777.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1df700aee---28759935072.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/vubijufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=platicas+de+seguridad+de+5+minutos+para+trabajadoresPDF link annotation
    • 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_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1