Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd73eb849f877985…

MALICIOUS

PDF

80.9 KB Created: 2021-08-22 05:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c351f1cdec4ea8e0325ef3a93c0c309 SHA-1: c41fcd414493562ccd023befd119d58e2a706add SHA-256: bd73eb849f877985f4820400e8f6177ce94df966dec8aa5b4e5d53161d73d76b
154 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous distinct hosts, many of which are compromised WordPress uploads or disposable hosting. The embedded URLs suggest an attempt to direct users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6637

Heuristics 5

  • 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
  • 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://scales-center.com/shop/fck_file/file/81610854462.pdf In PDF document text
    • http://championshipsportsrings.com/clients/23492/File/38707553805.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/bozotifibenonebovox.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/0i03qitce0n898n97t5f1tl937/rawoxavikuv.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/dudulubopizawibuwosena.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2e7a50e4f8cfce221d200b8f14c19ba1/bixenapezu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d96ba2f8f---67463134121.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/fijerejitadetaxunoxajirij.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/8312929359.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609eab7749492---85884504671.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202108081203221355.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a3f1ddecb---16222514775.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/83136182553.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/51554659020.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/71466823314.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/nubuvufusugape.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16113bf02d18dd---26392399689.pdfIn PDF document text
    • https://immobilgold.com/file/dazeruporofuduxezozi.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87dc2bd40---domudegok.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/m4qu7h01ak15f5dj4ujc7pblo2/nozelebepugakalinigumir.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e818dce7fc9---69047234772.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb0f3b70b7---59748646409.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/d2cfd76938ca86fb7664f113315a8aea/gurumexiwev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+pair+xfinity+xr2+remote+to+toshiba+tvPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2625c911a2---7433961779.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 17356 bytes
SHA-256: 91d9b17c80f69871505638f223b1a38401a605661d4ddc6d4e44b81da3d0e26e
font_01_sfnt_off00012ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1