Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df245bf320e5926…

MALICIOUS

PDF

60.8 KB Created: 2021-09-04 13:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0c8d6739475b69bd6ad1244d37a7b0e6 SHA-1: b6daab9f18115f6e174372101e54ddfe2da640e6 SHA-256: 1df245bf320e5926b716e4009a985673b0bf2c9fc26687afe6ac85d0bc17b6ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious files. The presence of external URIs and link farms indicates a phishing or malware distribution attempt, likely via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6508

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://omgmediatank.com/userfiles/files/75094610515.pdf In PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca23337d9c---tatuvibodamivope.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/dinezo.pdfIn PDF document text
    • http://ozkayalarlojistik.com/userfiles/file/rotejodoj.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/93412830606.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608081d1afb07---tazukogajefutejum.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160804e8655c90---39970253071.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/3552257526.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/tubegamuweza.pdfIn PDF document text
    • https://chornakorn-packing.com/ckfinder/userfiles/files/22717046353.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d039778056---vebep.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/20825029476.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/datikabip.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/cdaada7f7e08ac254c45b2c80e17a4f8/24116878795.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/78694435912.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/91473542434.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/894b4a4b04182b2e673f15f3436830e0/59337623914.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/27080095358.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bae1fd672f3---munalotarodiriludebed.pdfIn PDF document text
    • http://packturf.fr/files/jusiwo.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/padibugopejisepap.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089a0a2d7df8---sedumexododegokedisubuxuv.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089a3d25546f---7134059632.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733320536ad---51505300814.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/deserelomasanader.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=anchor+panasonic+switches+price+list+2017+pdfPDF link annotation
    • 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_off0000ba06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA06 11128 bytes
SHA-256: 6f04d2414c44445a4b69c1ac7cc78ef9a811fefd0fc28d87cf1900dae7c977bb
font_01_sfnt_off0000d429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1