Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ebad16c1bed5e3…

MALICIOUS

PDF

86.4 KB Created: 2021-09-07 01:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ca876e38980bfec6b9d3cf9dd931c6a SHA-1: 80b30bb52a6e96e39f5ccbe3c48e3b4a7d697d39 SHA-256: 08ebad16c1bed5e3b2db40627fcf8edf0500c474128c174090727616010ab9c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate this PDF is a phishing trojan. While no scripts were directly extracted, the nature of the embedded links and the detection as a trojan suggest it's intended to lead users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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 http://x04ydivan.ru/userfiles/file/19763072782.pdf In PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/nekiwidevi.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/18927102563.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d98c265b64c---6599357044.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/1281652478.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/75742535112.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/telifuvoxad.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/kexamizusemoriwat.pdfIn PDF document text
    • http://zubrcup.by/files/files/xuwenep.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sogatemofujagitixodob.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/lilafikizuf.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/zazepadobanuworesap.pdfIn PDF document text
    • http://flomojapan.com/upload/files/66262981056.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb55888d9ef---pujuxadasafewojuwame.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/51103486865.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/jabemejajolunopewuluxi.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/44327742307.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/38657170122.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/71797921357.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a8b12ad8a---xeturozurorulik.pdfIn PDF document text
    • http://giga.sk/storage/file/wotefej.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/jiginuj.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/jalex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=formulaire+demande+allocation+chomage+pole+emploi+pdfPDF 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_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 10976 bytes
SHA-256: 8336a6d992f4bd53bd88506c1efdfd55842f3da35070620ecf082209555bb113
font_02_sfnt_off00011b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4D 18640 bytes
SHA-256: ec9b4683b62deffd135061c6db83d1fb0c6685f10e105235a23baf2ed6a339c6