Malicious PDF — malware analysis report

Static analysis result for SHA-256 200667f51ddc6d3d…

MALICIOUS

PDF

84.4 KB Created: 2021-07-02 11:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3fb3d377f0d7db76ef3c405178d51b54 SHA-1: ca22ca97ad862df47ea907ee8e1a7cbbf2dc9c76 SHA-256: 200667f51ddc6d3db938bd1cd3d128e16c2c929362ca62a91eb3c068aafd1522
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers flagged this PDF as malicious, specifically identifying it as a phishing or trojan variant. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0f409a4d5---30093767669.pdf In PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a076bd8dc34---7010549696.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/a199719fa73ec13430aae4a3da25cd1d/judijaxiluw.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/41087281641.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/6750890777.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/11226188940.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/bowukabusova.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/92244842276.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082305e5c54b---27999580360.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098cbea31e8c---gabigosubudetagufi.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/93e2efc69b00d3ff6c27a3cdc0a2689a/wunazadewaxadagixe.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609055e32f972---83549855722.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/37aee46f5ca4ddace247aa6fb4e827ed/zipibenazenojav.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e79ff5966cf18660f68c787181e4bd86/28221743843.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/sobavopugetufamofimus.pdfIn PDF document text
    • https://bbmint.com/userfiles/file/78830883588.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/f1423a510a53cce992168a77bf366aa3/nonamoragawugezuxugoza.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/8h7gk4s0uq7an6u1ba9hg8jn03/34412393743.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/nalezugad.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/95625111266.pdfIn PDF document text
    • https://medtek.vn/storage/file/25769563048.pdfIn PDF document text
    • https://isosklo.cz/uploads/39130670306.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/xeguwewufenutufulefo.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/81119454972.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=state+three+laws+of+static+frictionPDF 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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 16884 bytes
SHA-256: 37a0c43fcd4336d46312ce287289ad339580876ee8e9b6b6933723d480b9e12c
font_01_sfnt_off00011415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11415 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2C 10596 bytes
SHA-256: 086ba9f31063ae985672bfbee35f996f4afb5d1089fa1f1f2bec8f15efa17732