Malicious PDF — malware analysis report

Static analysis result for SHA-256 104d6df0ccc1c805…

MALICIOUS

PDF

74.3 KB Created: 2021-05-22 04:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3d08bc7c63ea09f3c17b78ceb3863f11 SHA-1: b5c8ce920587a9a0e99bd847efbedc24be3d3fcb SHA-256: 104d6df0ccc1c805f16d8158ec1882f48ce2c94bcf554182f8a34ecbd7505c15
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or trojan delivery mechanism. The document employs a social-engineering lure, instructing the user to install a browser extension or update, which is a common method for distributing malware or stealing credentials. The numerous embedded URLs, many hosted on compromised WordPress sites, likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nomylo.ru/uplcv?utm_term=cool+emoji+copy+and+paste+for+instagram PDF link annotation
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/0uq81fc1mtu6s49icpg3kkel22/85572181159.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/mqevl1msqei31vngtgf3mjor42/48618175569.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/a15b6cd21cfa32bca53596d3c88f0d41/93099075528.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/rmn6m0ql7gmlp9g2b4klu3t5v7/vovidakogowowemuzaporu.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160857b5186c0b---23996290214.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a2b0810ca9338b225c93eda5794000c6/xaxegodivowul.pdfIn PDF document text
    • http://altinay-law.com/images/file/16818351747.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/niram.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/ff5d556da34d08b048315270a82cd36e/tepatejeweputuzoris.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072129697686---9658780106.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608472ee02720---naluwubolo.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/27389823738.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/2c4af78eb97e68d48be10e98e2f35a36/57361536151.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/0qmkjlg1a658ii4q5cl2kcmj7p/xodesekal.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/88304658912.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/050e7b9c5c44385c00cd60fab0e27a5b/3480357040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 5556 bytes
SHA-256: b228253abc08b7818227990af6efa140421cd540ad539ce3fc90936747887daa
font_01_sfnt_off0000f8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D7 10400 bytes
SHA-256: 6bda5acc782d60e13e892e35652f13a8d44c60e0ac61a40a42c86fa36521499d

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