Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd3990bbc82f2f5…

MALICIOUS

PDF

91.0 KB Created: 2021-07-23 16:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4771bfbfbede907d3d1195659264cc3 SHA-1: 8aad2aeb9d1ef7844e74fdedc15b57ba8c1041ec SHA-256: afd3990bbc82f2f56426e9b5bdddbe80ccc3e5e2fd40ccee6453b30cb0388018
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host and distribute malicious files. The document's structure and embedded URLs are consistent with phishing lures designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8e6b3b7b1---60614521027.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/bb6443aae842d467f5eabc985a5a2f53/56951415159.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9c0b5f0b1---91114095027.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081bcd26ffbc---jiwunowekesi.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/567ccd7781664304361100ffab6c4c2f/pedujokufatamaxedozonusi.pdf
    • http://batiment-tunisie.com/userfiles/file/42590998976.pdf
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/dajatoses.pdf
    • http://morard-mcf.fr/data/Files/gowatujeraxipolidoga.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f4be1145cb5---50067984218.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb41987883e---fugujamudepe.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/tu78adspqc452u8q188sot95cf/44377342896.pdf
    • http://dzbnf.com/upload/file///noluvu.pdf
    • http://goldnumber.info/userfiles/file/naruwazijaraw.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf4bacd569---46309703354.pdf
    • https://xlspandoek.nl/userfiles/file/tomazokudagi.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/rv536g2q7g3p7p8ve1f6b8b76r/nabopazexew.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/f609bc93d04ea914cdcec96c56c8a545/fofurukemorazu.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948566d693e---ginuwumura.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721cf8b561d---23479625595.pdf
    • https://prosaison.fr/userfiles/files/zewumokogeju.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607401a18e36f---94311882953.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e22ae1a33---nawofolifonepul.pdf
    • https://pima-alarms.rs/slicice/file/mezeroxasot.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160781985c5df9---difamomexoru.pdf
    • https://arhstroi.by/uploads/files/12222471764.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/6ed4b4fpr3ugpap8b97rbnulb6/nevatigor.pdf
    • https://gloriamus.org/Uploads/userfiles/files/fusesazijupuliliwek.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=bikini+body+guide+3.0+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_off0000fdcd.bin
ce120579e57842803ab6b93ef0e8843cabf923c0a720608f6f4062db7a1b6057		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 10960 bytes
font_01_sfnt_off000116f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F5 16792 bytes
font_02_sfnt_off00012f07.bin
53a26d450ad90820620d13e53345521ef26b4a30d4fd1712e05b271ef813dd53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F07 17244 bytes

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