Malicious PDF — malware analysis report

Static analysis result for SHA-256 248e2792ec07555e…

MALICIOUS

PDF

72.0 KB Created: 2021-06-27 03:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 145ee94375d718d954a7ab3c7d781ea7 SHA-1: bc03a7c95c44cbf8d10ee7b17f1183700204749d SHA-256: 248e2792ec07555e1eb2f0187cacff9b83a64e7ce9b39c76c75f5c31defb2360
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8686

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://infrive.ru/uplcv?utm_term=the+ants+go+marching+tune PDF link annotation
    • http://esipro.fr/userfiles/file/galowomu.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/negelolawi.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/lesofevusatotodaman.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/56697110925.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609525d260768---pixizinaburogurepuvazasen.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/90630572017.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acff6c5f24b---mifulomusefipuvujoga.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/texiwiliwamimopovoj.pdfIn PDF document text
    • http://berbun.com/user_img/file/jonapaxozujifanunakoxe.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c64c65fe0---pasiziz.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/751f55b006a480cae5a6fdea8fd3bf58/wadigunetusezupat.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/4dscfhg0mtlilcic5m5aeniseb/pomebilo.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/moridopefisusokepobikasog.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/11629847688.pdfIn PDF document text
    • http://i-biohealth.com/files/pofuwenumamalonaxiso.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/51451568097.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/83488313238.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/f2baf403418374bbef740489f280b643/54906238727.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/jituf.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/431ed0b0e376c7b8f29136ef7192f1fa/pokizoxejuvokita.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/94650228436.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/2ded10e9964d10a085c99b3240527030/xijixekalodoguzonofasur.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_off0000c671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC671 10696 bytes
SHA-256: 45ba60547c6a8ca2a92a101b1cc3e8b94681b2b3f2b17c699a2c92e695e0df4d
font_01_sfnt_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 16680 bytes
SHA-256: 8a34df0f78d9aa75d56865fbfe7fced1564780c993ab2fde0daa79920a72111f

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