Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbafe2cbebb71ebd…

MALICIOUS

PDF

79.9 KB Created: 2021-08-20 13:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b255a96a718b95e393ede55f291ed663 SHA-1: 57a3c2d85b9dec3d76e200305e7e168462cbda60 SHA-256: fbafe2cbebb71ebd3ab871aa5edc04724906a0f8d5a91da777d3a0a3037c1441
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://deborahkay.com/ckfinder/userfiles/files/66265761990.pdf In PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/86b10a947454c70365c4e813d1641ae5/robiwuziwelejilelob.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/88981870265.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/25575094875.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160adf0a2cdcda---nevavoledovulagejetujo.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/nalaxaxubegesara.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc63c3588---83450946628.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/rudufalag.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc918e8e1e---begipolefuj.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16293113360295.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/76218024235.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/kidufuwukibuj.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4fdda0507---40861262969.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/64699750612.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88650408415.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/43b746cbf99d5c71ebdb9a8fe2d06d2c/pigaliwudavodovofomirod.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7846c4415---69186185241.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/fbd295a996d371f00e915cd28c2b8804/50203983297.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf1d607ca---laniwetibefawiraxajabig.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/k1eq17pelpota9nbm01g1vdcg3/refesapemibaxaxugepiw.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/gavip.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/pidibo.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/fibitodigogavulujukum.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/83245142510.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/purigidejitagatulunipo.pdfIn PDF document text
    • http://erictex.com/ufiles/files/44644393630.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=la+novia+de+estambul+capitulos+completos+en+espa%C3%B1ol+capitulo+36PDF 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_off0000d1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CE 16332 bytes
SHA-256: bb44fc910a3a7e69d89e33cb471ed433c77c2d2e40b5de93a60288fa47867b64
font_01_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 11384 bytes
SHA-256: 6d82bb5ca57c7d67e235605f4e7e6eb39b67c91313d6835249cfdee3db23079e
font_02_sfnt_off00011556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1