Malicious PDF — malware analysis report

Static analysis result for SHA-256 0763e9045defeef3…

MALICIOUS

PDF

90.0 KB Created: 2021-07-29 15:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7727c6b3e8e4682cd0cba6d8e1e5f0ae SHA-1: f88bfeae2873330f18c281cfa3ce12cc501e0701 SHA-256: 0763e9045defeef3343e3222f5056552dce54fe64e097627b610047b202dcb02
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c54f7e82eda---kinogonugezavixutizi.pdf
    • http://ranjitabiswas.com/userfiles/files/58195769783.pdf
    • https://theelementrama9.com/userfiles/files/98225496728.pdf
    • http://boothbayharborshipyard.com/userfiles/file/1077193754.pdf
    • https://cafesca.info/ckfinder/userfiles/files/18429669681.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/4okodi6ah4r6s97u8f54oem6d1/tuzobebutuza.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/508ab400df2646078e207d6f79ebf985/zuvixerat.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f8627be96---lipep.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff42a55fc---kubizunadebijivu.pdf
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/82363940298.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e8faa5383---suzapilakurikovamomege.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8459ae80c---26461295305.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/74abb0952979ae1761d728a77c020284/80347046613.pdf
    • https://soyana.de/js/ckfinder/userfiles/files/gudabifokasokogu.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4020e4320---veviborezurorexiluwapavok.pdf
    • http://hilltop1976.com/clients/24685/File/riborimuminimereb.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9517e32c55---pizime.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094664cc0de9---wuzisozup.pdf
    • http://casaledellasignora.it/userfiles/files/fagefavalumejuzevejiwu.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2698d1cb1376df61af1fb491f1d97868/bowebonitosez.pdf
    • https://samsunyapi.com/userfiles/files/fanag.pdf
    • http://gayaarchi.com/userfiles/file/20210621114256.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/koxagatoxad.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/3c0a3e8bf9c4baf2d644de82e88073c3/15419520517.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=lowrance+elite-5+dsi+user+manual
    • 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_off0000fc07.bin
2191e195013288305f5e6d655d2785eac5daa6b0c629bf1a77fc924c4cd75760
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 17400 bytes
font_01_sfnt_off000129a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129A1 16792 bytes
font_02_sfnt_off000141b8.bin
a86f8a366237e9ca4de3a7b91155d40a804ae1db6e72d0d69e568704f0d7bb95
pdf-font-stream PDF embedded font (sfnt) at offset 0x141B8 10840 bytes