Malicious PDF — malware analysis report

Static analysis result for SHA-256 8776c62a18aa82e2…

MALICIOUS

PDF

62.3 KB Created: 2021-09-01 23:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c8c4dd97b855f2a91dcd97ba5227ba54 SHA-1: 898045c9b26f7efddc30c67eb6fd40fbc12463f5 SHA-256: 8776c62a18aa82e20c49750889c559f8787a1314c7579858fb9cf864e0603072
154 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of these links and the nature of the detection indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9398

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://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160701cc7c8e55---dejarelipum.pdf In PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913e85323b8---degulekigefimodogujexi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd26c24bbf---namixodejegoki.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/rizetaxogejirixaka.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/lajazateweb.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/tixexu.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/66509386018.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160942076640f5---kogavasowupomuso.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d58fda3a9---71354195180.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/gelapideraxegujezerewas.pdfIn PDF document text
    • https://coil.hk/upload/files/nafivenosolaninuzegumi.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/tagamajuguxofotawegunil.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/63158745433.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/3f65eb315d2f4b973e65286bd4b35ea4/92271408295.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c774dbfa93---ramojejuwukax.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/61614430920.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160712f6664e1b---zuxorur.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/gakilolubojika.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/26197129106.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160817daf365c9---52367284460.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//17592961496.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/jedezurevokuvubaj.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77a7fda08c---mozobuluzuzer.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/ktbhee2u48ttbd8qjfioa3b7l2/93165811034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+are+celestial+coordinatesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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