Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7fe7e78e6066b3…

MALICIOUS

PDF

59.8 KB Created: 2021-05-30 21:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cf19a6ac4001edecf8775202aaf8f0e SHA-1: 0ee715e4f7a7bc699095bac2c95be532051844e6 SHA-256: af7fe7e78e6066b38b3aae322c83607707719fa6e2c207f71bb219e3671aa9cb
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites that appear to be compromised WordPress installations. The ClamAV detection and ML classifier indicate malicious intent, likely to phish or redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a network of links for SEO manipulation or to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7926

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://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/caec8d770eb79d5a16a0f5f4bccb818e/vagupilekedusibawave.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b5dc88e35dab732271e3f05214a2f4f5/zibinepojopik.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f97606dc95---64782255504.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2irfgub3pu5tbv7htqudqp13s3/37762267392.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160944b98bf993---4063327910.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16079475d68d7d---53543959042.pdf
    • http://mulroyenvironmental.ie/userfiles/file/poxakipubamenape.pdf
    • https://patc.fr/imagesfile/46263160105.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bea3eddb8---befoje.pdf
    • http://sunjewelsonline.com/userfiles/file/43119363371.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089eab59126e---96039074460.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/147b0df9d5f56946b11c02aa75d743c7/govigogipexaligerokafokar.pdf
    • https://senhewood.com/d/files/losimumumetozododexubab.pdf
    • http://assushop.com/userfiles/assushop.com/file/dalofopaduwugelijege.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=harry+potter+and+the+cursed+child+movie+release+date+2019
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e2.bin
d225e437d67bd79532bf52f84aefe6487688cc07a7efba53876971832b4629af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 5916 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.