Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e19c6f2df8ef02…

MALICIOUS

PDF

199.9 KB Created: 2021-06-27 20:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57604b1754b4af15b267982deaa7bef5 SHA-1: dabde5afdc8bad6f2c89a017c774e9784ef56ef9 SHA-256: e3e19c6f2df8ef028122273b9c0921441ad252bb5f06bd1a2e9154a24dca42fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the file-upload directories of plugins like FormCraft and Super Forms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests the document is designed to redirect users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9821

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.
  • 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 http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d21e585dae9---89020721048.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924acb23d5e---96806696473.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/89f54fe2ef1d5c457c3b8b32159e5047/famosonozofuxeju.pdf
    • http://scro.ru/pic/file/jexupepafugalinasora.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/05ef6p9svbmafuqmkcj1fdsb5b/13594821669.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/d7ba72c89fd9d03d322869e98cadc195/kokavubomoxuka.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5c4cb8f45---43829989762.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/3c6ae6088fa65ada9777d0be400ceb10/jekav.pdf
    • http://greaterdeliveranceministries1.com/clients/61527/File/makorubek.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99fb9c1be6---14540471946.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9baee4665---povilisubomilado.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/80d0d2da8f3dc1dd4ed1ee43d7ebb2d4/gagaboladet.pdf
    • http://acpiindia.com/userfiles/file/fopazo.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/a22a1936ada3172e27f6d586172e9cf7/90177031101.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/0c3e696a1334ced4ef994f8770a9e9dd/88872871418.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb261afa19---69960821392.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/f5b6dd8f0a321770ed4d04d900c8266b/kekugefolukonometoxovitij.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/m6rl2jr0i712qbbj50i71gffi7/fabuzogamogikizuko.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076a24ababb5---ribisava.pdf
    • http://dientrotiendathc.com/media/ftp/file/82021162537.pdf
    • http://fxmeat.com/upload/file/63a0c33e51c7c21a6adb56c4e3168e81.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/dc500dc03f4567e11770f934f8d6cbb3/17636797293.pdf
    • http://wib24-admin.de/uploads/file/ralatagesow.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ghost+adventures+crescent+hotel+full+episode+online+free
    • 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_off0002b0ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B0AC 16792 bytes
font_01_sfnt_off0002c8be.bin
5ac1feb0fe8ed177ddadbe655e6d605d09052b4eb02bb292cbe42039e44f99ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8BE 18344 bytes
font_02_sfnt_off0002f7a0.bin
9c7184d6d7a5baaef2cfc2cf435c23545117bcdae670cae1fd9ed5c4ec59d35c
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7A0 10920 bytes