Malicious PDF — malware analysis report

Static analysis result for SHA-256 df209b07d497faac…

MALICIOUS

PDF

103.7 KB Created: 2021-07-13 11:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4f8f417c30252a58cdfcd8bdad6d2c0e SHA-1: de2fc9f69955aa55b20cf9e26d9997c5b1a66fd3 SHA-256: df209b07d497faac115355854ff4ca9e90dde10aaf856375972a9d7cd001e2fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0r55gj938u8d84e0m2dhv04t1f/xederigelelifobafukod.pdf In PDF document text
    • http://exoticland.bg/upload/files/files/xirafetawakoresalilizo.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/046e821cd427ee1bbcfdfd1595ee7b3e/likamiwojatekemalebulug.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/seluwez.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1aaabfda1---36424846915.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/zulirolapikametipa.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b692772f9---fawivalunakukejori.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/marimabusar.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23a408e05e---83560238107.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088fca61b7c6---bujunowuzoxabudugi.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/88391671246.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/j4d86iv6vu55a6vq037d92qac4/71969575120.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ce27b90e9---2404948979.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105210304391045.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/3ce0ab5b6075b6c6fef313ef9e83567b/1504597683.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/tarur.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ct7avdk2anmnb70bilft3pggnm/zijugunapudirelotebusurak.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095ada1acecf---32644656587.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/kawikuju.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/bovetunolijuja.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608010b39f299---58763125894.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160791740a3594---pemapawoponunujavixidijim.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/60566432333.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+make+money+on+bitlifePDF 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_off0001353c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353C 16976 bytes
SHA-256: 537d5441652df305cad7f38d2052408cb7dbfa3319109250aa18f7d03bee8d18
font_01_sfnt_off00016190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16190 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000179a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179A7 10532 bytes
SHA-256: 79c4976c13fcc2e8b41f245d5fbde1eda28d5b5557274e580664423e72f2986a

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