Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e9086890a1d4a5…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 23:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e14d3ab107b058c9075f6662ca0af46 SHA-1: 931853cb7870618d1025390d1f9b0ce4fd8e0645 SHA-256: 95e9086890a1d4a5a5c5ed49bb88b2fdb10deab6e382ba008577da0e5a06c423
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious. The presence of multiple distinct hosts and link farms suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc59376cb26---mavididedusapodusakozudoz.pdf
    • https://tootooair.com/FileData/ckfinder/files/20210612_047BBB43BE16B774.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7889b5ea50---fekunilukunibavo.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6587764640.pdf
    • http://agiusfuneraldirectors.com/files/file/2725239719.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mihnuogpj4hfqsadjbia5s5uj1/xavax.pdf
    • https://dacinsara.ro/fckfiles/file/rosujaserope.pdf
    • http://manajrgvaaradhi.com/cms-uploads/files/lonufumaf.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/0aff2ef1848352fc2dbedb5c70ede200/pewudadadusini.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2dde9e210---wapazabaniwilowev.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22bfe7452e---ledimamupetozujape.pdf
    • http://zetrade.cz/userfiles/file/tusasojubovuwera.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2fsrd4ltnon9bkh71pdhlcj8af/bomojodo.pdf
    • http://sneedfamilyct.com/clients/44919/File/11354611436.pdf
    • http://dhf-china.com/d/files/wuwamuvumowimod.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/7teet14lq5vgqac4k3i3ll66is/90817909865.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17396392ff---12677640330.pdf
    • http://laweasy.kr/userfiles/file/lizerevalukanufej.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/f97939b0fe1a571361358933b8ac3fc3/zogegokafazujon.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098428fa3075---82135286349.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/63683038638.pdf
    • http://podlahypilat.cz/admin/file/88336156674.pdf
    • https://associazionedynamica.it/uploads/file/wufamosisibu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=brother+xl+3750+instruction+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_off0000e657.bin
f91fbdf24b3d4bdb9e9dcae4eccb12daa900139edc0ff2412a619acb375f06f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 11228 bytes
font_01_sfnt_off00010099.bin
dd4cd844fb1f0bdc612321657adba28c556a5b5ba4436e300d5907a0c0e98919
pdf-font-stream PDF embedded font (sfnt) at offset 0x10099 17592 bytes
font_02_sfnt_off00012ec1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC1 16792 bytes