Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ee96b89b1c431f…

MALICIOUS

PDF

95.5 KB Created: 2021-07-17 13:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07a6d81a85ffdd9c558ea03d96ac9246 SHA-1: 2bc5291965cf226c73c5e8a777233a12611e7423 SHA-256: 74ee96b89b1c431f9193ea18a25fb875ca492198b34005a9bd0ec9235cb8700a
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://swagath.co/new/ckfinder/userfiles/files/91826285892.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/e4f52a1b095df9d8b70b3df8959081c7/79925723411.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f34183b45b---84436295539.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/24236703028.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93b1c1411---59336980068.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1094d272bf---butizixisusebotukebi.pdf
    • https://dalyanestate.com/userfiles/file/mirixutoxalejowakax.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/9a479630d816f5f2685a9b8d55e8bc51/74524745287.pdf
    • http://reutlinger.pl/userfiles/file/jogujep.pdf
    • http://jarosi.hu/files/file/41859463671.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ij3gdbld08ukb57ha277msltr3/7379646794.pdf
    • https://africanresearchcenter.com/userfiles/file/68035550919.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/4e5e0f91d152dad2b7e2cc2f9594b02c/pipipamolonarawebo.pdf
    • http://demkapi.com/resimler/files/98472143914.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/575b2798f281b14ca1d64a25e2a6f122/jekunubajivureminex.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab405701f74---96185430689.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff342c5296---supibiro.pdf
    • http://dermatologomiguelgallego.com/miguel/fck/file/rorixatitetafitabuju.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/womozafonarebakila.pdf
    • http://alnadaoil.com/userfiles/file/balowiwowemuwafobi.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085592e746a5---xafovokuduve.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607536158e164---9741705504.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff9cc774c5---wonugelezogotabutebab.pdf
    • http://meble-tk.pl/userfiles/file/pukukipijuve.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a409811d768---korifofufa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=academic+ielts+writing+task+2+topics+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e09.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E09 16792 bytes
font_01_sfnt_off0001261b.bin
52112aa31586a34465e4c043c4156978fed273dd239985c793fff6783adc8b96
pdf-font-stream PDF embedded font (sfnt) at offset 0x1261B 17756 bytes
font_02_sfnt_off00015452.bin
8306ae474d95fc018ad4cbd3db9aabfc0fffad339dd9d97bcf19e6f70c6eb425
pdf-font-stream PDF embedded font (sfnt) at offset 0x15452 11240 bytes