Malicious PDF — malware analysis report

Static analysis result for SHA-256 7299d6d2aefa68cd…

MALICIOUS

PDF

84.2 KB Created: 2021-09-02 10:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3479051cc5a7f5b4172a9c4e1f7b3be9 SHA-1: 05f71d79bb0d80941e67c28e49614bc22e7e4799 SHA-256: 7299d6d2aefa68cddfece3b9e5bb30ec3f9e3cfcf19d9d4fb322f110bde699b1
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/68589489343.pdf In PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/49663332292.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/45624451229.pdfIn PDF document text
    • http://riversreunion.org/clients/8699/File/55737045710.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094571ef1e74---83682450695.pdfIn PDF document text
    • http://expresskaliski.info/file/84544427029.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/96390192264.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/senurafisu.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/cd22561efc649bc470983a3933478c96/73508510519.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/4128709063.pdfIn PDF document text
    • http://cvconstructionsgoa.com/pharma/admin/userfiles/file/58742792551.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/98272234945.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/aee68399bfd6a91495d01456b5bc0b88/76922621650.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/bufizoguwojed.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f9353138c---11404153992.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/8g49i0ubvbler5p1ajikg80s6j/95197908085.pdfIn PDF document text
    • http://15881588.com/ckupload/files/nedivemipe.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/joderer.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/68429587985.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16100a7d36064b---53564768470.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/90279351461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=object+reference+not+setPDF 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_off0000e1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B5 18764 bytes
SHA-256: 28940eb309dd60e8fd77b3cb68f6c5ed6981073e1f2e0ef7ac1c28f4d70ef8b9
font_01_sfnt_off000112e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E4 10324 bytes
SHA-256: e6daaddbeb6a69e330d4bbd8a5008cc142e9f6e94fe46b3c3e81fbc165441687
font_02_sfnt_off00012a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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