Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3c46d19d99366b…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 20:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8821bb26a47ddad8d361679d572dd412 SHA-1: 04c79c7d8b93b2687baa0f36cb0a19b223a03d87 SHA-256: bb3c46d19d99366bd99d2fa267ca2e29ba1208c7178b19e0fa730cd9720bac0f
124 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to direct users to multiple external websites, many of which are hosted on potentially compromised or disposable domains. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly indicate a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47902014470.pdf In PDF document text
    • https://nutricount.cz/UserFiles/File/80595237331.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-3/20210503060704664753.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072df4f259e1---49111428572.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa71bcc4e8---89755538000.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/60667185187.pdfIn PDF document text
    • http://kokomo1986.com/clients/31029/File/26990838343.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4f8b73102---55405652690.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/lupivarefofelawoxuwubad.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/35561813972.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609160b707ec7---lidibapokunoxiwewejofi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082b7ec22d92---72018696287.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/janujemiza.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087167927832---482628484.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/68988540344.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/pipusareg.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/70796932775.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/bidojubanonokazetusi.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d039e6955c42ea186c46c9c37c7a2ec6/difogumisifupomijelu.pdfIn PDF document text
    • http://vce34.ru/attachments/file/88340003693.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b97afbc7791---43990695429.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/65109663640.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/wifoxuvex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=joovy+scooter+x2+double+stroller+manualPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750d86383f5---sotevoti.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_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 11072 bytes
SHA-256: f07fbaaf240e10632c6763a7bb01a35a4ed1e22108d6db30f7ecdd12a443084d
font_01_sfnt_off00011477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11477 18392 bytes
SHA-256: 0d9dbf74ced54aab15ccf158d617c4ff39d18f7a00b1abef34cf99d639e3b20b
font_02_sfnt_off0001440e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1