Malicious PDF — malware analysis report

Static analysis result for SHA-256 0192024e094bde9e…

MALICIOUS

PDF

88.2 KB Created: 2021-07-29 22:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cea46323912252fc077c1432e5eec39d SHA-1: 576549c7c134ec1586b810ad31baf02ec6f41bdb SHA-256: 0192024e094bde9e6ea79588ed28ed9e3a940cba37bbe2662b1c17d3d84a9370
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/suweregukefexamo.pdf In PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/jazekub.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075a6d39a175---22419518846.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/10616472285.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607794f862f41---vatuxinedeluvogejimilagis.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9059d6b0c---zesasogipuxil.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/52065151985.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a1f8d1820---piniwimil.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/zofumozeputigono.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/688193c8a14f2f534b5d2935a82d36cf/savefadevesofavebevika.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094592c0f3e3---rowewufarutotowiw.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d9bd617f6---rututasaxajetagumi.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/52636248021.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/japoxujoduwa.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/wavezipotip.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/ponigezaw.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8db774e5c---25252358215.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077512978a07---puregazu.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/52414253539.pdfIn PDF document text
    • https://actor-conseil.com/files/file/90040946855.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/5233793242.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/dirikikevuvugiguf.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/1214052250.pdfIn PDF document text
    • https://kawanmto.net/contents//files/pudedusume.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/muzoturimekigevekejetafa.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872b768baf1---nawasopuxop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=syarah+hadits+arbain+nawawi+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 17300 bytes
SHA-256: 8ee61dc6e36cbe8e3710e72e9fe49296f95ff12369c0c831844a1aafc370a213
font_01_sfnt_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10712 bytes
SHA-256: a385ae5e0d93e22e44c247d8cbc5e763e680cb8b71f575ec885ed96d0d915e73
font_02_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 16768 bytes
SHA-256: b9f3e3b1eb9c0f505d3d4e32ab66b4b1bd4fa42441ee7ac6161a150533987d9d
font_03_sfnt_off00013ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1