Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7f7d023d5db17a…

MALICIOUS

PDF

573.2 KB Created: 2021-07-24 15:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 769f7378313eba3827ba9f57f3b70ec6 SHA-1: 3af7fea951f7e3393a1bc6fa2fb39041220e9114 SHA-256: ec7f7d023d5db17a4adb5367b4f9f2ed18c432720b4a92e48c650316159e63e5
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a compromised WordPress upload directory, and another acting as an SEO redirector for a 'free download' phishing lure. ClamAV also detected this file as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to trick users into downloading malicious content, likely via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8756

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://podiummagazinenews.com/ckfinder/userfiles/files/notofanagafok.pdf In PDF document text
    • http://moreit.ch/productinfo/file/filexevonewosoj.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/vepiwevusu.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/o8ecat7md5d0485b3lss5pfvr1/pejilukipokan.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b870cef227b---vetirozibapomexowix.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/73754011027.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/mosuletujegenakuvumavireb.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/jebimidupawesux.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fce755bb4---97368702778.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a302c8a5258---wibilekepatipugofivaj.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/mituduvetusafexirop.pdfIn PDF document text
    • http://df-foundry.net/d/files/vuzod.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2847cf1cf---teletifiruraxoseboribig.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ddddca17c695a20f1d78f5ce56007889/jajigagusifutegumigefef.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/wunilupimiwawanadija.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/ligevezoli.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/1925b1c6f2176e61d7b03e228840742c/32752043148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=microbiologia+medica+murray+6+edicion+pdf+gratisPDF 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_off00087788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87788 11480 bytes
SHA-256: c3ed151ef5c95a266a9250b7ce55105eb9dcfe2b3093b909c7a53a77cf5fa683
font_01_sfnt_off00089255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89255 21288 bytes
SHA-256: 018fbdf16eda2e8d533a65a431dda581bb3dcfcf1ae083b8c57b473cc65210a8
font_02_sfnt_off0008c942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C942 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1