Malicious PDF — malware analysis report

Static analysis result for SHA-256 8418c57806c46190…

MALICIOUS

PDF

65.4 KB Created: 2021-09-02 10:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 477d512338369263d8b4ec050f1e08df SHA-1: 112a19c8f46839a7da8d802a41d86a7915ae46ba SHA-256: 8418c57806c46190fd0394175339508874e898b0002551e80ac68495e9e4bc4c
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, which is a common tactic for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=introduction+to+solid+state+physics PDF link annotation
    • https://fnb-concepts.com/images/uploads/files/vigilaturoxoxexugu.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/77013940731.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/pusepasafejipomexivalaw.pdfIn PDF document text
    • http://falls67.com/clients/50406/File/82341168374.pdfIn PDF document text
    • http://ruresept.ru/files/file/tajatizafilozaxutalatokof.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/17742b3a6e161ad9ef1c6562874998a9/82005388507.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/xejakok.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e11102c73---49387661544.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/e079bec251d68123c9ddc20511524407/77802966925.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/32877687324.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/lizolo.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ti33m628l51v0qsn0msaogrp36/92567387226.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/vugidamowab.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/55258192172.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/65295386772.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/xiregigorapitigapurifa.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/18205bc7332ad59a64769d03496c790b/14751560439.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca973c05d7---38974162642.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-8-22/20210822004604700553.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/pisotigevowi.pdfIn PDF document text
    • http://webbuilders.com/files/file/rixeferab.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608468a5161c8---84301448699.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/tutolegopirelolebupam.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210831011224_ri22m3.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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