Malicious PDF — malware analysis report

Static analysis result for SHA-256 2923c10382147f3b…

MALICIOUS

PDF

84.5 KB Created: 2021-07-03 02:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5035565a4dd30601fd7ba7bbba2aa3a7 SHA-1: 9ef1817861164cd9d251eb382df41bcb0596d91e SHA-256: 2923c10382147f3b6ca5d6c15ff20a22d6e5c6d3fd07858ed7e5192a299c7b2e
154 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution lure. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. The embedded URLs are likely intended to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5833

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://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160710dda1b0c0---13585492968.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d55ce10274---61104911737.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/70610127211.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609661eb3a1e5---94660226143.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/78623189012.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609abc469fc0d---wadonuriju.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106040121262334.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/b875dc98a131a3becdd5285d2b49030c/76967525477.pdfIn PDF document text
    • https://landbar.com/upload/files/xolefup.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/fikov.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/89679191885.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/c826fe20d4ad75ced80fe5b0c7162ef2/25105812801.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/7331cqb724aae7sk8ojfo99s10/jabenuxesore.pdfIn PDF document text
    • http://tragadsonisurat.com/ckfinder/userfiles/files/42442026973.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085738522ea3---43769872694.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/43802189029.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/nuvomimimikerafabesolex.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/fikaruwidowaxinikaxur.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3151387a3---74238248643.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/mojugenafomuwewub.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/wuxozalusosubakekewe.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/5da14653de86bac7b4a621adb6e480cb/84198586272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=rogue+galaxy+weapon+guidePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11038 16384 bytes
SHA-256: 2d5ee3f0236459eec4659b3ace0b6cd3219cab641db1d5a80fc3db9de834865b
font_01_sfnt_off00013ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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