Malicious PDF — malware analysis report

Static analysis result for SHA-256 cecaaacafa1b4574…

MALICIOUS

PDF

79.6 KB Created: 2021-08-12 17:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 785101226310e5751b75ad745fca1206 SHA-1: 21d2aad937d412318e124b164f822ba1f589fe08 SHA-256: cecaaacafa1b45747e04980472d69d67233b097d0c88a4d61ff5bf9682648b22
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish for credentials. No scripts were extracted, but the PDF structure and embedded URIs strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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://chokmanee.com/userfiles/file/tojuluridulinev.pdf In PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4079cac8---84108135633.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/tirifosarijowumu.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8schen210ve0tqg8239ucl9tf5/fomatulule.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/tigafilivezipek.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/nh6i58mjd2i9f73f1qmfi0gt2n/pibuwudud.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/29647680972.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c771a38e10---65732670228.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607176dba350f---98178227452.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f1458954e8381eccb6d1ba5c4e694f61/pidapegaxiribukelififemej.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161142893c2956---towekezomikakabamo.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/d6ff77af8c1b6eea763ec10e361448bd/buxunuv.pdfIn PDF document text
    • https://coatielectronica.com/files/zedipepajug.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607af8623fa3f---28904176956.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/suniworev.pdfIn PDF document text
    • https://magatek.com/documents/file/lutewifexovevoludagun.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/10923601960.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/monekurelejura.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/189981567361102b82baa58.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eef51d6d4f---28589313399.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/619f9e45e79c8b5f949fd6a7f6985cc1/96671943792.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/worapugirapujofewil.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/o0jk25j1h7akocdtv56b75pt94/tewabovawapopan.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/79205584414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=importance+of+artificial+intelligence+in+educationPDF 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_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 10848 bytes
SHA-256: 7e2c51615c27382f0f96967331e0fed95570d74b41ba29b5f8950054c6b3bf5d
font_01_sfnt_off00011c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1