Malicious PDF — malware analysis report

Static analysis result for SHA-256 808a460006bb60ce…

MALICIOUS

PDF

68.4 KB Created: 2021-09-18 13:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f1314215ec5eed14a095a1bc16bece75 SHA-1: ab3cd71a0957617cf62e6ad4729c64d6979750b4 SHA-256: 808a460006bb60ce4e0496cdf2fceb602c0930db3aaea18303c21e50f22dd95a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and contains an embedded JavaScript stream. Numerous URLs are present, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of JavaScript indicates an attempt to execute code within the PDF viewer, likely to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=hack+of+8+pool PDF link annotation
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/0f010e78647af88aac6c3427085b946a/laseparuvu.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/27549260406.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/10191346738.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/30551425726.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/latomovobelegofabira.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/57072254353.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/nirife.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/jamarujona.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/50532486379.pdfIn PDF document text
    • https://zzhqhi.com/d/files/10416104853.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/mdqhleemrb0a6nt8k3s0citgma/3221338406.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/bemube.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/dixokugavipurit.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/20510550543.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/51420045003.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/39951838304.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/3475908502.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443ad061fa4---75273356719.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/18248563413.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/be33bbb4271455c366e2ed3ee9c229e2/85404063521.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1631030387.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3b46f044b697633eb0559f18af2a6a7d/36160836223.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/nabamelemaloji.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/fikamips1q1sr285gloihjk193/rujiruxoluzaf.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/70184698184.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB259 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA70 10068 bytes
SHA-256: 8fe1b7731560c967ed229eb8f3610babd249a3eabffc3492f3c3185119ee2c5b
font_02_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 14196 bytes
SHA-256: 8ed213a4ae3e62097dc57a79214926fc85decd21e29d442ecf3e5f7f678d5aea