Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af6300e1b39ea5c…

MALICIOUS

PDF

70.5 KB Created: 2021-10-01 16:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 74ddf18c46ef434ceb4b85dc98e72ba9 SHA-1: 5159623e824f667860173f9b22a52d9e3550ede1 SHA-256: 2af6300e1b39ea5c024e83a43ddaf27de588aead5abd9f7e68f0a0278a3151f2
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The embedded URLs suggest an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd1682f949---nafiwefuwamokofiten.pdf In PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/zuwumoma.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/faferamomu.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/95944566501.pdfIn PDF document text
    • http://orthodoxnews.us/file/dabilizugizilefifunovufi.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/91647579731.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/vewowimesukabugilugiforop.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/dazidapo.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/32703827148.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/gijuvarulu.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/fatinarawu.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/beminezuwepizoxuvipotu.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/sikemur.pdfIn PDF document text
    • http://turnyras.lt/Files/file/22837333197.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/kaluxozidugijujepul.pdfIn PDF document text
    • http://abwva.com/uploads/files/jidavazijuk.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e52d444576db2c94beede6466716dfbd/jagasajamenodaw.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be00e698c6---50608769076.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161470382f20b0---72562250440.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/68512812382.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/robatox.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/52579980444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=i+want+to+download+among+usPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000b163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB163 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC975 17160 bytes
SHA-256: f514e1988245bf6795cc44ec3fd554080c4bff49c73ce581972b23a232761990
font_02_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 10404 bytes
SHA-256: 22c5d6222fa5fc063cbd045c2cc8c5bf50d4dd97c191fd9e2d71664731aeceee