Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce47b36c16afa28…

MALICIOUS

PDF

95.0 KB Created: 2021-06-27 22:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 301587a27a365374ebd6b8eaae83ec47 SHA-1: 9c0176137317be7349ca4abe77d63da72bb07211 SHA-256: 9ce47b36c16afa28a43f0776326ca1fb03326be59359d3484eb032f98e518f9c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ddshower.com/ckfinder/userfiles/files/85996166579.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/42nfjoe5m9su9q4kvmp7l07hk1/foxejusipowijobu.pdf
    • http://anaminfo.com/attachfile/file/93408845955.pdf
    • http://jtour.vn/userfiles/file/97249915566.pdf
    • http://babamoleskine.com/files/file/74387543013.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26828a2a27---35618876806.pdf
    • http://www.rify.us/cms-uploads/files/9348652530.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077007e465d2---bunat.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0223ed4ac---55208729740.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7d117ceec.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160742b7573909---98226168293.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/4e6041d3de2506f199e6fb318dbcaf4d/vakegeresurobawosekabu.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/m23ni70nd8alalnkek2f1tji25/kekubefeliresotep.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/mmei675185va8anovli6l3cocv/pidomi.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a349ce5ce---31120171485.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888fd490095---nisupabexulijo.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/fq2alprbeh2oltijtqv7s75f2n/162789376.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/6nck4lrl2jgorap114g23sb47d/50804793659.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608276c7efc8f---gipomefuremexevobobazoze.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a365311e4e4---dixepinunemigid.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbe649a33d---28335859275.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b812761fe69cbbd06954886d89eacf46/40243922918.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/99jv7ju7jhjse98vl8qvet4t2u/89739341516.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=pirates+of+the+caribbean+theme+song+piano+sheet+music+free
    • http://medlab.webd.pl/upload/file/89915994915.pdf
    • 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_off00010f99.bin
609a89f3b0005d196715ef2bd562944ed00a2f8aad7a3ce39aa509e3bc74d9e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F99 11120 bytes
font_01_sfnt_off0001292c.bin
43481e2dc10b628f031c30179c1bb77a9e0deafa7dc5a55c33beb836d2f6c291
pdf-font-stream PDF embedded font (sfnt) at offset 0x1292C 17528 bytes
font_02_sfnt_off000156ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x156ED 16792 bytes