Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b74d8a5bb06cf7…

MALICIOUS

PDF

101.9 KB Created: 2021-06-27 07:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d223bfc2cd7839f02229b43fdcfc01d7 SHA-1: 97e345c992e0362536285e66027afc70721db6a5 SHA-256: 96b74d8a5bb06cf788e782275b83f94b49126afc3ce3dc294b6e33a85ca95b80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a74c8502c5c---resewoxapumebuti.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/4qe3m08jjrilmdmm1u5k38fpq3/10185955221.pdf
    • http://studiopignotti.it/userfiles/files/33366706360.pdf
    • http://tafgambiatours.com/userfiles/file/taxavufuzi.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c005cb8535f---20267544138.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1aadbe6213---58676236556.pdf
    • http://hainescentreasia.com/images/file/79366326134.pdf
    • https://cmfnepal.org/userfiles/files/vutisebivi.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607088aea57a1---68764568588.pdf
    • http://bajcsidavidfoto.com/_user/file/luxanovejuvapegiz.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160add1c769bea---85488510450.pdf
    • http://rw-hse-businessconsulting.de/userfiles/file/zurapop.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c689f7a061a114383baf1b27dee71d6e/razupopabusoziwolowija.pdf
    • https://seripin.com/calisma2/files/uploads/29024675886.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1e6bd8484003ea65e336e04e83233f0e/lemukuwa.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/94ba527a6c7491903f7eaf1de918f0e7/34878911879.pdf
    • http://pulsarvn.com/media/ftp/file/52088132498.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/e8577d1f2bea66017ff4f5696470fe52/30570094217.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/p2i4qsil1l7osurove50a099m9/lebatiwewe.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b7102d0c095---6572924678.pdf
    • http://banquat.com/userfiles/files/jeforinokerikojisuropal.pdf
    • http://nextgt.eu/uploads/file/15905647691.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/mqsa9lrtpbdkqbj9hbrrr5h42b/24125973747.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097ac083a602---voxeto.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=indices+surds+and+logarithms
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127D3 16792 bytes
font_01_sfnt_off00013fea.bin
2b508fce9bb39beb38c688a4bd2ea9892799bc9b4103c200e661aedf046dcb08
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FEA 10868 bytes
font_02_sfnt_off0001589c.bin
af791e1c0638378c5eeb4449d1823d60b1fe8435be795a35bf29ab053885844f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1589C 19044 bytes