Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03207715568ced6…

MALICIOUS

PDF

92.0 KB Created: 2021-07-05 19:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91f8c3f0b50aea3a38f9da105d643946 SHA-1: b5da4b3c0905eb882162116e9bc2326f3af75460 SHA-256: e03207715568ced67f5822127058f0e952f788970ed9349d365ed0823c24622a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a malicious download. No scripts were extracted, but the overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 4

  • 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.
  • 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://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/04bc97ddc90cc84d711ff10e6d97f140/dufedibasatifimon.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160741ee0d2299---4246421715.pdf
    • http://amsasecretariat.fr/userfiles/file/setuzika.pdf
    • http://penzionklara.cz/userfiles/file/58781236366.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/3e37467b8e280e08a9996b1e191725a6/18480393381.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/37tg4jva9o108njne8qr2kiv25/49024434647.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/4o7pkogl2l39lhu5p7bt4d72f5/rurulasaren.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/u1buhnrf22icmc0pr5lht18oo7/woxironisebulegeluf.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d3a49a08c---4690325630.pdf
    • http://buergerforum-tirol.at/file/fijipiwabixuxobunanolosiw.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a06bc613b60---pofukafekopipimiwosibapi.pdf
    • http://yuha.be/_files/file/58964133497.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/94et6uvb2h71dfefjprh8b5ku5/67621233162.pdf
    • https://aradovan.com/userfiles/file/59278456442.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/misajivatelok.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/816b434e81a0459ecea9730b85a79e71/dukabiguvajovomufiwazavo.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/f4fe53794f27ac4e3f1031b1f5cb39d9/vagemukavekexokizewaba.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/48b284211a87a436d4a8423008844058/98714375311.pdf
    • http://minhledtran.com/luutru/files/wijijimoragozax.pdf
    • http://barcelonasixtytwo.com/userfiles/file/dosel.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/8ub1la2vavs9lrktehegmvlo3r/jetitifozigotedimezuwifem.pdf
    • http://bakoca.hu/files/file/rukajinobexibid.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ad88c16269bd565deb31a7b1dfca215a/zusagukitunogojanekebagux.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fd05188d9ade1ea6e843c534425b4772/tekimewunimofuvunarumim.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cdd255733---390685734.pdf
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/rakurazufirerifuji.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=yawning+throughout+the+day
    • 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_off000106dc.bin
9fda07a1e2e5befe8593b5ad1355d4662c737d40dce1712fde0954515d6c91d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 16776 bytes
font_01_sfnt_off00013268.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13268 16792 bytes
font_02_sfnt_off00014a7f.bin
bf9aaa8b13a32f2b56227a9af43d308342afa97e84f98235d02b4ea639a2c88d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7F 10596 bytes

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