Malicious PDF — malware analysis report

Static analysis result for SHA-256 2996df6fdbf086c4…

MALICIOUS

PDF

64.0 KB Created: 2021-09-06 03:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a2a2577ae0953f79a44f33a98d9d2d3 SHA-1: 30269331df968311ddb537d3e564fed4d9d548e0 SHA-256: 2996df6fdbf086c41f750b4ccd4154ec076a5db8e7ea6f1683593d9641580da5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised CMS upload directories or disposable hosting. This suggests an attempt to host malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6306

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sincaremedicaltour.com/js/upload/8411755666.pdf In PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/rulivobopujup.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/tafanara.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/runumotipabose.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/roronebevagotuxogop.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/73645663579.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c822bc3140---lekokubijire.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160944f5e9d749---tuzenomaxid.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/lexokifejab.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/vakaz.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/65764830363.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/37b6a2115ca1fe4730aa8a5c9d02a834/38673611741.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8742cca745---50898017472.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/50487643616.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/4674534075.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021070906501780554.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/xumixonegedixisaxuxar.pdfIn PDF document text
    • http://phanbonvbm.com/upload/files/33372125811.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d93e8959a---zojam.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60bff333da4e6.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d841ebcaebaeb62893b2de1989a4a3cf/45374010887.pdfIn PDF document text
    • https://majubesar.org/contents//files/46034668932.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/10215776dc83d67968201a0df9425883/wigesaxugaridusinapiv.pdfIn PDF document text
    • http://adveotec.com/img/file/vusinerazojagegixav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=catherine+hall+civilising+subjects+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_off0000cece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECE 11244 bytes
SHA-256: bb367cbff1002154b927495e63f59cf0b90a8cb3502b402f1043431379ce09d2
font_01_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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