Malicious PDF — malware analysis report

Static analysis result for SHA-256 64074efa90099315…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 17:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed97bf1647b5824d465475cc17bb7da2 SHA-1: ddb5a9eb481c6d89858555e2849f5f354931258e SHA-256: 64074efa90099315c32d18618af28eb344be9fc4560c36f0ec44748120284bb0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of `utm_term` parameters in some URLs indicates a phishing or tracking intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=nauseous+after+period
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ff38bfa61---zubitux.pdf
    • http://monroehighwildcats.com/clients/40160/File/82708822761.pdf
    • http://www.adarshvidhyasankul.org/userfilesfile/vemupep.pdf
    • https://motacademy.it/file/86200192102.pdf
    • http://hibertek.com/image/files/20210627_194725.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe71e1a0c3---81527050015.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/78a2a487776a57ed48205a5f99310f3b/xolowuxidarikopelebelus.pdf
    • https://tekmaker.com/upload/files/61055903584.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/5uk7gqdf0pk4o2f33qb2g9fme3/90953336614.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/420231dfb36d217d18dc8658af4e841a/baxetasesogud.pdf
    • http://hasyo.net/files/file/64129494850.pdf
    • http://wolfroccatiassociati.it/userfiles/files/37397272165.pdf
    • https://underworldgear.com/upload/users/files/kobolavadazofakefoxobotev.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/0iq7svo15ep58ojf1ihdp6r8e5/39990837845.pdf
    • http://apexnepaltravel.com/userfiles/file/zoxinezuzinabejujo.pdf
    • http://compufoxmail.com/userfiles/file/jebekimasogowovobipeme.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/937a957baeed0c83a4a6107a7f9d6b4e/95104497526.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609835356bee9---rigufoditixubatexefanufen.pdf
    • https://windsbs.biz/files/file/18288696813.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/4676d49fab5a2ac2c4044aec6663c35a/9557601157.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160abfc946396a---43596170085.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/3a90b680de87f7d623dd4635bbfc5022/66619798188.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160928cfcea4ac---66761681124.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_off0000e9b4.bin
733e1b8b8eda26a7240117ad088751f061142d6f5e8048ea8ec3911a1e0c65b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 10420 bytes
font_01_sfnt_off00010173.bin
14af2a0280e075c326ec699433d995f71a5c7adb84dc7e198ea124e5bba66bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 16088 bytes
font_02_sfnt_off00012b13.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B13 16792 bytes