Malicious PDF — malware analysis report

Static analysis result for SHA-256 73702c2f70a74133…

MALICIOUS

PDF

89.9 KB Created: 2021-07-03 19:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54ee10b979d851e8ce9ebfa8aa2b6367 SHA-1: bf96facc2ff72ed93ae1bfc1e520edce693c4c20 SHA-256: 73702c2f70a74133ace79da6f1ce4cbb26b39f406e86ad3a299ea2c719c3f6e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or domains flagged as disposable link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. No scripts were extracted, but the structure suggests a malicious link farm designed to lure users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://ubestsports.com/imager/files/20210607134745.pdf
    • http://gyobel.it/public/file/98223614221.pdf
    • http://agcslohian.com/userfiles/file/kajerinaxidekujanovokudu.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608461c6515ce---48745411954.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/9ba1f7237638bb4466d2069f22c920fb/64027033653.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9695c9aa87---84724764757.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/708d73ae2d2d29b215938d309369e819/zoporizupitonimisaraditaj.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d49e573a61---45920884066.pdf
    • http://vietsonplastic.com/uploads/userfiles/file/87802706478.pdf
    • http://eurekaelearning.com/upload/news/file/bejuperoda.pdf
    • http://bensonlandscape.com/editorData/file/magupexorifutomo.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7fc5c2ec57a51912bbf39ba8cba116c3/94350533067.pdf
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/161847519799.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1a24d43996de1d3c9a6cd25e880568ef/lusajuwisifusewagisevil.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/7584e0ddbf30f3935a52c77aba9376ea/280865263.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/8e8313dc294267eed4ae1aeb0c4adfd1/pabunizazewu.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b92ed72a7b5---52806246226.pdf
    • http://lactopad.com/uploads/files/movikenevodixipomaxofave.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ddaf07ccfc08448347a4d945e277c5a6/10409594045.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac43944cab9---xajamiwawofarizakopo.pdf
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/jusolopovaputevilojagu.pdf
    • http://ddgasul.com/userfiles/file/vumoz.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aca06e4253---nesonefevonedakemunegiw.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e7e61134c---5465962689.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+scan+on+thinkorswim
    • 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_off0000f7d9.bin
662ef37453fd0aa04f089a7e7c685fc6b0f3d74906842af1a4365645efca59d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 18476 bytes
font_01_sfnt_off0001294e.bin
04de247443342e9406c3fc167958d2741d36a87fd7a6f0c0e6a22570b0c87459
pdf-font-stream PDF embedded font (sfnt) at offset 0x1294E 10484 bytes
font_02_sfnt_off000140fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x140FB 16792 bytes