Malicious PDF — malware analysis report

Static analysis result for SHA-256 96deee95c05be1c9…

MALICIOUS

PDF

86.6 KB Created: 2021-06-29 21:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fee34483c6666728a718e69af9a0a31 SHA-1: 0173a6bace3a0ac91b627f3c6c449cbf65052e66 SHA-256: 96deee95c05be1c993d0eab70229a7ae0b1d9db5399a5bb7afda989aca459a34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cructi.ru/uplcv?utm_term=supply+chain+management+sunil+chopra+7th+edition+pdf+free+download
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/23ebd38e8c7e283f08b65e2340d458c0/55084477503.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdcb15fee7---nojokabosim.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/34e726543c7bfab3cc8d574004fcab64/fekelelor.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160858bb75dcb8---nufib.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609af70f2cf2e---mapowarenafijotoj.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/27df93cc9566be13f883b5c7d4fd7dde/87263537732.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/cdb49fce954a2fcbea6d8f27e5090ea2/fodewogefav.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f87ea3b275---92326916225.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0185d091f437d30e9cf224d0e637f855/dagekiligajowo.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d9bae64c572fdf697ad1a834001fe296/lupuzomifomenozuvajo.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/2d1d1adbabcbf76c7557c07b454cffa1/49152399441.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/37432f9e72d61adc6720ab82ca12b389/97823174002.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607064662566e---77807760179.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160927027eaf0e---borodezorokakamakave.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/8f24282296b918c92bded02e0632760d/wapibodemilujoworidazu.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61021f2b40---porogopiwoven.pdf
    • http://studiotecnicomartani.eu/userfiles/files/63638721342.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_off0000ef4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4F 16792 bytes
font_01_sfnt_off00010761.bin
a4242743f62bd7f5a67d1cd02e1d9e0e63a0bca3d385444184a17906a450e040
pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 16416 bytes
font_02_sfnt_off00013206.bin
d6a3a14a1f67dd8aed836daea1c74bf2cd02301b133fec40ff92662e01be700e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13206 11492 bytes