Malicious PDF — malware analysis report

Static analysis result for SHA-256 e954d6954b0f0fb4…

MALICIOUS

PDF

69.3 KB Created: 2021-06-29 00:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c8879ed59f1565239a9b4b5a5f1f59e3 SHA-1: d3721555c8ecc8ad523eddf384b90185c643441e SHA-256: e954d6954b0f0fb4476974f29db6a8c40dbd0d3557f622469ba5514b7b5ce13f
154 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

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 https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b74ceddefc0---26457413492.pdf In PDF document text
    • http://firegallery.ru/img/upload/puvabawilutopokamepe.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/bigivigelabixifoj.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/48555730218.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/87626998587.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/78120522707.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/52592065839.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b753756e3---25037396123.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/bebetesugipulisu.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073a15c488e6---61110053915.pdfIn PDF document text
    • https://coluer.ir/documents/file/fufekawipiwizenewutedaj.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/46497edfa8f7685358f7c600f695717a/jidinev.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160967e24e5736---papaximoberiganowitunew.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072701c3c0d7---6197614080.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/73557551092.pdfIn PDF document text
    • http://veivel.com/userfiles/file/toluxazasukagolomesi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/51090586278.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/3e347935fdabb4bd91e73ea600654aa4/vevimubewagunexosu.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/6336a4bb6cbd2b46dc8d83e53d62a2df/somalupi.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a61ac45560f---farebupolaxedokudurobolo.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa911635de---tadijakagotidub.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/b4022bd82ed98a6d09bc29666c8b5ac0/buzimo.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfad8ddf57---76014930426.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/3f61c0d41fbb2e6338cc47469c255e9c/47360581598.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a3f3c0cc334f87b86458452773a82593/79557764039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+teach+your+kitten+to+use+the+litter+boxPDF 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_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1