Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78585e5f524732a…

MALICIOUS

PDF

73.6 KB Created: 2021-06-23 05:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 755c0f761ca13b3f01d29f1ed55c0a6c SHA-1: 52e472b9ef6cd4fffcd9d336f29f0563874239c8 SHA-256: e78585e5f524732a7bf14aae50840cabdb6d86efc69377479824c082426b7950
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users, likely as part of a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9194

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 http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d284a13458f---44261431214.pdf In PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/978ad5ecb74c693c38a750f4c2fa6d52/56545010362.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/90fab8f65e3bb7889b33db414c09b2e8/tinukapizedijolinofaxu.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab40e15b851---jimuzogubebekajotubor.pdfIn PDF document text
    • https://zold-kommando.hu/files/75031575760.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/72326190374.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6919c5f89d---vizolopudavodebiwogapu.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609de1ca99e87---badofaperowuwugedawu.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/juvezanopabedogulil.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/vd24tg46lrvvfpnb9vclcsbeq7/52603435211.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/53555cde5bb8eaa15620c5c6ba7ce5e8/poxedofezana.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/8ca5aef1eed3080172673d2999424c1f/15339607523.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/87020056281.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a766d2de29aa71a90d523162c2f746d5/66606800580.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=xpdf+pdf+to+htmlPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 4776 bytes
SHA-256: a194edd5102d0f883698bd7e5738ce0a875557279816659c01853679300807ee
font_01_sfnt_off000105ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 11336 bytes
SHA-256: 17918e926af6c688b447065fb92e276f9bb9eaa10a7cdf4b7475eeb7c364395c

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