Malicious PDF — malware analysis report

Static analysis result for SHA-256 68841199d11ef941…

MALICIOUS

PDF

102.5 KB Created: 2021-07-08 13:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 495a774e2307ea452c6330878acad022 SHA-1: 9878a763cd39ff54ab70ccbc6e613aebdf71d890 SHA-256: 68841199d11ef941ea09609605649cc800a9cf90a2fda98a955f60f1f065e794
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a malicious document intended to lure users to external, potentially compromised, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • 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
  • 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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/mdlskc2lckgmrppda5h7pi4sm9/fegafo.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2e9b888a6---61915487252.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608759fea740f---vakumis.pdf
    • https://slide-bearing.com/d/files/74001108628.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/e791929d4a946f97af4ea71d19e88ca4/pajozixaximalopuku.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cc79f6b98ee4f402fd6cc770b66e247/sisabivajarataxepik.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/rcgfcqadtrhfoqjhijcb3gptfd/fosixobagosukatovo.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1ed1ec5c3---wupofigowukejekiladewina.pdf
    • http://deepakbatteries.com/uploads/file/1964853737.pdf
    • https://airflow-skateboards.com/userfiles/files/parutedigawijitalajexa.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c594c98b69f---22290084517.pdf
    • https://betenagro.com/sites/default/files/file/finikukamomowolaroxodur.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607123a1519be---suposijoxuwekujenosin.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/c52776bc4c93b9d1fbc9265b71e5fdd6/34881085637.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608558c5ab631---96158277388.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078284943f0c---3953104723.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/gq8vgaf6avufaio7ua68vl5bi1/tafidigaxo.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b701dbc728a---rupaleb.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968103a4a97---94490729433.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e070b913e---vadejilezigi.pdf
    • http://waltripclassof74.com/clients/8/87/875eff38522a6836d9fda94c5a2b6b26/File/wobopifew.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070df4606ec6---dobezav.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=fat+and+fabulous+life
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b3a2519e5---76756171439.pdf
    • 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_off0001306f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1306F 16792 bytes
font_01_sfnt_off00014886.bin
5cc969869712188728018adc9b67fa0842f6cfceb71d325428c1d4e0ebf32f93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14886 10464 bytes
font_02_sfnt_off00016057.bin
b51881d6f64c05034473b59ab0b16a2696dd4ced259265c817002cb24ab9dcfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16057 17132 bytes

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