Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9965502d5f83c33…

MALICIOUS

PDF

90.5 KB Created: 2021-07-02 03:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ba98e25a8cd544bdf0fbc27cbce447c SHA-1: 2000618592720fb6d788336e12ccd2c17769be5c SHA-256: e9965502d5f83c3358de182924437425fd9a4768eb73d7f48265564b90cd8bee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae6bad4f16---91595979195.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2448a5b5bd---vaxazunozizogopobotifofi.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/0af961e39de476b8b619788c879e6c52/mefikigulajigelonunad.pdf
    • http://www.netcorp.hu/data/editorfile/96637736645.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/1defe830171e2b69ca47529d54d6f328/karuteruxot.pdf
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/zutatigafiv.pdf
    • http://acecaalcoy.com/userfiles/file/87742888124.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a81385de9ac---lorojililojomogepugili.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9b2e47316d906841e825b6810fc9897f/59193842111.pdf
    • http://watdoenwevandaag.nl/upload/texeb.pdf
    • http://ncabhsa.com/clients/875427/File/mowoforeju.pdf
    • http://wabasnb.com/files/fckeditor/file/93013562860d405a52300d.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/98baf01e3a120e7f9395ca6b226995e8/resirematuzadujidipe.pdf
    • https://hzautomatisering.nl/userfiles/file/dinomitikamufuwavogize.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417a58f4b9---gupilemanajorubaxapoj.pdf
    • http://tw-go.org/files/19837058405.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607395622d48b---dakabaxikizad.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16091d0d2a28a2---67387258824.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086ae0ca706a---52683318252.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc44bb2f6c---82893054910.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/568a44b95809a988a4425babc7659a8c/85953992167.pdf
    • https://alianzatours.com/imagenes/file/81462240522.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aec3929f308---gatevev.pdf
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/51904614179.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4ed3a13e2---ludavasur.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086adf7a4550---77659048293.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=drain+perianal+abscess+at+home
    • 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_off0000fd4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 16792 bytes
font_01_sfnt_off0001155f.bin
b9e3e4f2be4768de142ba135cdc49bf01258d7dbe4de969c807bbfd02603967f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 17880 bytes
font_02_sfnt_off0001443a.bin
65630e3e785c8d0fed0b18bf2dce8221c4125cdb9d6124aff9b5355d145ff1ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1443A 10780 bytes

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