Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c72cc89435a4926…

MALICIOUS

PDF

63.8 KB Created: 2021-09-06 13:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b283698ad6c6f6a07d6ed984dfb268cd SHA-1: 98583748c1d03701773f658c2cd6de14c3ab2745 SHA-256: 2c72cc89435a492685bee2d68458da1d5d388ab50977a2f2b55219f00b28e9d2
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, identified by heuristics as a link farm and potentially malicious CMS uploads. ClamAV detection and ML classification confirm its malicious nature. The embedded links suggest an attempt to lure users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7744

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://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb49625bf2---fogepatelutoxubipomugu.pdf In PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/a26dadb39d7a7faccd45b9f6a0ccbf63/wezidumizowisutosojojowin.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36342746d0---89198875912.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/nudobumajeledoro.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/8769233209.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73723921f0---pibebosaxorilitumivukop.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/14014682546.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/08dh6i7t1gul3u3ahcfqk7vfpl/51760334773.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/panogukujupudogopefagos.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f22e2fcc5d1207fff834be6b582db5b6/lulikedobewurarajepip.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/68105279901.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d1afaa989---nitepupon.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/63722417053.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/btdi1dhfi8j0un9eanvu7aiaik/pazogatutapilome.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/58316093220.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/vidugalisimavifimugowad.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a397003b9b0---bapamemodaximuko.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611de585971c7---86068616850.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/zegopaxawaligu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/afadedafb3dd7efa0f5feb8fd9d70806/38507062649.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/nuzekoj.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/xilobudojakozufumunoz.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/52232254954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=namma+kalvi+12th+maths+guide+pdfPDF 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_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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