Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d609a2b9cb9598a…

MALICIOUS

PDF

81.7 KB Created: 2021-07-01 14:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cd4e2ef88ecd70edc91ebc9c1780ede SHA-1: b98b505394bfe3a05ed7333f2dd149bfa8c37ea2 SHA-256: 6d609a2b9cb9598ae5d2fcfb19db65056bd9db49700fe853b3fa34678157e012
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://balarampurblock.in/ckfinder/userfiles/files/96199877238.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608864a428e71---wasugujijanaro.pdf
    • https://aldurra.ly/images-editeur/img/file/robixibizufafap.pdf
    • https://leosservices.com/userfiles/file/xatoxifejeruvemema.pdf
    • http://wib24-admin.de/uploads/file/kutuzibivegafenez.pdf
    • http://castrolmintabolt.hu/images/upload/file/fadezunurezer.pdf
    • http://pattarasawat.com/ckfinder/userfiles/files/monulopuzesutevunusopow.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3e46a5ece---suraso.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/luvedinivofet.pdf
    • http://grupophi.es/uploads/files/27983981252.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/10170fa177d7fb5e27e1eb88b3ef8344/pakifuwom.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160863ea23309e---23169961526.pdf
    • http://www.lnk-creation.fr/upload/file/burozadorumo.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a23347d6a47bc8bea2fb3b3efc16097f/70379170774.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fdf900a43---sovipamojuri.pdf
    • http://peaceinsrilanka.lk/userfiles/file/fegopidabanajavupametotiw.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/sga638tbdvc8ggpi20rtm32et7/riminajipubiro.pdf
    • https://businessservicesuk.com/userfiles/file/37395160872.pdf
    • http://internationalnetworksolutions.net/files/
    • http://udelimpa.es/ckfinder/userfiles/files/siwologa.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/o600itme1b1hvfpctgvp2im32l/pazug.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cea61f28f6---lilutir.pdf
    • http://upoart.com/ckfinder/userfiles/files/45457140477.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071de6f96d37---8091992439.pdf
    • https://t2sc.me/userfiles/24373318814.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=create+element+javascript+with+id
    • 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_off0000daa0.bin
b08ef9854750c99390be4f272db0d2b247714151d2393a087ef306ce52e52a89
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA0 17428 bytes
font_01_sfnt_off000108ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108AD 16792 bytes
font_02_sfnt_off000120c4.bin
ef183672ed50bab3facba9471bc3e595b572843a6316059c0ff4eab664040a3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x120C4 10972 bytes