Malicious PDF — malware analysis report

Static analysis result for SHA-256 2762e0d447317bdf…

MALICIOUS

PDF

105.5 KB Created: 2021-07-14 05:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 238e4c05a9acaa66e96774a3ca48c7d8 SHA-1: 0afa7f0007cf1c4388ae582cd8a18253d993c824 SHA-256: 2762e0d447317bdf56561f765179eae2461567007d1d6168bb74a66578950797
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that exhibits characteristics of a phishing lure, as indicated by the ML classifier and ClamAV detection. It contains numerous external URIs and links to potentially compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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=cookstown+shopping+centre PDF link annotation
    • http://www.herbertvanderbrugghen.nl/draft/zibekosoponubep.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083688e98e63---71014966143.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/46759300894.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/64300243339.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/gakip.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b73a4c282b6---61091287456.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c54db133ebd---relodaxorasogisubimi.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/vuvelikopekamajaju.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160771d7c9cd85---rudufek.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/7077c7a95638e900c8bdbb54c6b13bc6/ruputaserumafaperukitaw.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a3002e84a---korabadizusigotagajig.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/59609893590.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bd6d816a8---bemane.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d25409c01---xofaz.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/diwamo.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/turazuzupiboxopidekuweraj.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/99146098469.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/webegaw.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/e9j4jil0n46edpb5btsomnfua5/20320669401.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/07/13/12087106124.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/lonad.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/50898107250.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adf42dc198e---36274228151.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CC 19312 bytes
SHA-256: c4c15446b89173f3438a6490283bcab0e3c8de753f561d73e43865482a95291e
font_01_sfnt_off000167fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18015 10656 bytes
SHA-256: 00d818adf3a35c2c5bf8d2f8443ed0808829d762d2a29b7946d2fb102d2a28d7

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