Malicious PDF — malware analysis report

Static analysis result for SHA-256 274c9eeb37df17f3…

MALICIOUS

PDF

70.1 KB Created: 2021-07-24 13:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a7b01c76dde349af5f1450bf7ce759f SHA-1: ef0b5f04fccd46bf5145a1f57bb1d5807d3ce114 SHA-256: 274c9eeb37df17f31420a35e8878dea79a85e6cf6f73d4ea87a9f33b9f63a7b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or conduct phishing. The presence of multiple links to potentially compromised sites reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7779

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://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/e51ff580b619c717ee7e1e2649a0e979/lipakekerunufix.pdf In PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26a6e0d2c5---50948024606.pdfIn PDF document text
    • http://sharidyer.com/clients/863431/File/67243148303.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/92151590265.pdfIn PDF document text
    • http://vinmexindia.com/uploads/momaxapefan.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcba8f3d8c---gogivaruxukeram.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/43894266406.pdfIn PDF document text
    • http://fullx.net/files/relovovigaj.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d7f15be8cfbbd67657db6fb3a0752f8c/58594103482.pdfIn PDF document text
    • http://hondaototananlongan.com/upload/files/gixegilibilolimex.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/23632340965.pdfIn PDF document text
    • https://latework.cz/soubory/pejog.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/275ab35329f9071dfe2d92a3c002444d/61223570050.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160982e1e02229---99733586384.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/308469522ed1c0c66e31f6fbc311c879/dovokisedabizedisojajita.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/8444371921.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/remikegez.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160894a95e6d1a---22076093677.pdfIn PDF document text
    • https://area5srl.it/file/durileb.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25bbd2e501---9837726541.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/31069129194.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210609_7CBFFAB57434E2B7.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=friction+practice+worksheet+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 16972 bytes
SHA-256: 33949f6664c89fa99554d1a551fd7f7c0e4681b0bfe4795d452566aed0a21233

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