Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d6d766d4ed3809…

MALICIOUS

PDF

67.9 KB Created: 2021-08-09 03:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5462aacb28b1abec6556783f726557e9 SHA-1: 0324aad4de9eafacb77df029fb6ac5c8eddec429 SHA-256: 15d6d766d4ed3809d1ce722bd45aa8953b429dbd166c9d4cb941f3971436905b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely distributed via spearphishing, that redirects users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5043

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 https://crewmak.ru/uplcv?utm_term=kabali+full+movie+2017+hindi+watch+online PDF link annotation
    • http://www.prieteniitehnicii.ro/documente/file/3961248167.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/dupaxoraga.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607294cc59d3e---xowuximigojefamajir.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ab141fbc68b---tugojugagemixiwaxewer.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pezigixuranudumusumilumig.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60fe33eb85863.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/a90a2da7898ceef684322cc00e12d33b/74202323365.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/00638046329ab6eda9e1ef8a4ab07966/dipomibupuka.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/94i4742n8j6j7evlcdrh4khh6p/nusugos.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb489345c---75742561068.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16079b15ca74bb---metasataxizadaputar.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611043479102c---xanagobuzuretomomoru.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/90466414384.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/fe2e7b8355229971398367064a44cddd/67019963472.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db12650ba8---devuwogowoje.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/gerotazub.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/51149049277.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf18c5d6cc---96213859977.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/vawajigigozunoxijajoxumu.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/xavizekuvufelajokiniwar.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/39f6c17c55568ad579561a2d213d802c/pexaxanegaziporefuf.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/kfnr4eddi34qhikd86bma753kn/65291108515.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/18575839929.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/kanaduj.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/51678816271.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/mekate.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD358 11200 bytes
SHA-256: 077176e1e3ea01ca36cb3405307a5ca7a61fb8a967eca03bb27f5a8b3ab68cdd
font_02_sfnt_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 16408 bytes
SHA-256: 5da6b28ee8f4473c4eab2b9d85708da4aae96742928d417bb3835642728eb6ad