Malicious PDF — malware analysis report

Static analysis result for SHA-256 457401719b249e9f…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 07:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 996c5e00f1cafefe02e51dde20d971ee SHA-1: d7f38eafda16a4ed9175b28cc654d0876bff1ac8 SHA-256: 457401719b249e9f01e2476d3eb5e6eab458e33409289cadae506079c4f92fa8
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns suggest it is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://goodluckfishing.com/ckfinder/userfiles/files/bokinenedime.pdf
    • https://sinhadventure.com/uploads/file/muvafom.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e13eea624---92965597675.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082305e5c54b---27999580360.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/f37d2925f213f281fbb8146101ace9a2/tuxosenuwomolekojapek.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc7ccea90f---49896415515.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/dd44a14cc331258e7c484c8235f5ebfa/bapomejalisubabatatig.pdf
    • http://wisdomtours.net/upload/file/xagolaguno.pdf
    • http://tfh-filter.hu/_user/file/xurib.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/0c13d6720bebd2ec557a68a9b64dd0af/sosazaw.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e3826f3a---59732051993.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093e537360f2---zipujazinepadoporipe.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609103b2d1af6---82903083585.pdf
    • https://irantruck.ir/data/file/49907710089.pdf
    • http://zaun-produzent.de/userfiles/file/xexer.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/2c18b375df6b2adb9f3663e9612f82f5/59293782320.pdf
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/98756807237.pdf
    • http://kme-kme.cz/files/file/kusebawatetigaganuzozawi.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608340ca45a06---42723281386.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/nasosobawililujisem.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f35ba6071a---niriti.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c3de2ca7d51---lexesudepi.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbac309a29---45192896975.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c43aa246d---55326159140.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ad173c44b510f05fd9a204ea0bbe1daf/39810055643.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=mechanically+inclined+meaning
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/7ef9e28a141c2a8a96ea08b881c4f275/bekevojatoxojo.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_off0000f2cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 16792 bytes
font_01_sfnt_off00010add.bin
f92352030543c712bf6d5af47c6598b634b414834116c9392741f9bc454bc377
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 18732 bytes
font_02_sfnt_off00013b70.bin
3e1655716be4f3ef6906e9bd68fda196193df9dc469f6bd3abfe7bd6f709795e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B70 10440 bytes