Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b87fd7636f11650…

MALICIOUS

PDF

81.3 KB Created: 2021-09-06 05:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8f6df10789f0a85599e9792f7fea6f47 SHA-1: 3b72901146388d8e408b3a0eda8e794d6cac06c1 SHA-256: 5b87fd7636f11650cdc35a828c836c369dbc5310a02165262674bc9a635999ea
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4007356ba3---8956025915.pdf In PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/tumamifemizaro.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2426e37c20---71525468287.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c28fd5328---36953745091.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084ec79c51ad---jedonumivakinifip.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/lodagewemuluregusejiteba.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/pabozilaxatenudunovofiza.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/86145813310.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/21408958169.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/lenafepobizasesusez.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db0570c0683---12621493991.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/fixisunixevagajeje.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16113f5586833e---93222786248.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a122a1343a---79132115835.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/lededex.pdfIn PDF document text
    • http://geose.ru/userfiles/file/88457895099.pdfIn PDF document text
    • https://fptica.ru/images/file/kuromo.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/zumose.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/0b1da172060d1607cbeed6fa9a61bc0b/84203251890.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca2e9edf22---56211200390.pdfIn PDF document text
    • http://vlajamo.cz/images/file/76182936348.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/71843692542.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/72916099065.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/1a5dd295372b43f7be13bae43da812ae/73239628357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=diccionario+de+medicina+pdf+gratisPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 18276 bytes
SHA-256: 37aaff7ddd3b85b403b5b979df29f9d38593ccafe502343237714a5cef15bc42
font_01_sfnt_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 10916 bytes
SHA-256: da2f2a5b1650fb71b956ea1dd5591ec1977838c8da36945fb04648b02708e292
font_02_sfnt_off00011f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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