Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d9ef5fb94cf217…

MALICIOUS

PDF

72.1 KB Created: 2021-08-06 04:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1ae48b964d76bd66455441533b3198da SHA-1: d9b335cae930ce19184c9098c0c6cfdf998dd40d SHA-256: a9d9ef5fb94cf217919448bb1162a01d9323efd02222cc460b7f66d3802c67d9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of multiple external URI heuristics suggests the primary function is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6658

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 https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/55ffeacf76dc75172c3e8a59a8a338c8/kamelujigapev.pdf In PDF document text
    • https://bruceleevideos.org/images/file/kenogipanudorukos.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/30b09366936320fcbe110f43b12cbdd3/bewebopadojuguwi.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee76db86b6---fanozefekogabebajitasepov.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/tedisevagevolarofi.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/21006982811.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e25f2b6388---ruwitedodez.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab61acff1---pebupinijukuwu.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/11520003674.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/tedapisawexapafefu.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160745049738d3---lenododow.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/3222529672.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/5380ecc1086197e753bdfba81ad3a147/jelatarebunirozapoxujijoj.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830c819c7e3---likapofisi.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/poxinawutarixefozujifed.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7lu6iehs3fjj6nt3166qe1fj11/12494331182.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16080cc0965bfc---59437578512.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/27748851415.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/82074841523.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/86846658561.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/wetakibiw.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd0f2ccf0e---23991432768.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608375f7c7114---kilirekirojevorovexonobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=minecraft+master+mod+apk+unlimited+moneyPDF 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_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 11080 bytes
SHA-256: 6ac1e587adece3927ec6c9d8b4d38c35c148a62eac554bc9f7deba21e56fcf21
font_01_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 16220 bytes
SHA-256: 132f05ce40ac9038317ee37a5988612cc6d75431eb485d801d5d4d5d0d706cfe