Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b61aee205b8fff6…

MALICIOUS

PDF

162.4 KB Created: 2021-07-19 17:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d32838712b087a45c4d35cea3bea753c SHA-1: 4aeb41f313c74de76466a93c3e44c87becf50afb SHA-256: 9b61aee205b8fff6e53b2284272d38fc6688a367413f8dc944b6d861459b3576
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4592

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://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/j6lklfae15l68c6saui5c2aodg/fekovumawedorifuwa.pdf In PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b842442bcc---segowaludigatasumumi.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/buxosugilutejibexo.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c81e85b5---77020842438.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/e51681eb79a9c82fcedc83c0f7ecb656/kenedipusapitisiloveviv.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fede4b3b18---55480081395.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/pulazomubezizo.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/09c11b7eb758f45550674aa8b79e0daa/binelimu.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/9e0f56df823a82a923a44a82e063c95f/gabisekomagog.pdfIn PDF document text
    • https://x-software.cz/data/file/jibud.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871ff54e1a1---71343804200.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99734820550.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d1d584bd---vinedadimem.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076baae07806---14075198051.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6f4418f3---ruvonurugib.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608402d6e03da---74467345163.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/rafutigugadilugefov.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e644f6153ee4dd3fba8807b21484bd2a/gufivakati.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607942dd84309---zitometojunisumopudebavu.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/tunokutelojatalijas.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/0bfa08f4cfd44053d5f8d8723520d25e/wanavumusef.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/nejusejib.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e954dc50f---dozas.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825559e8934---61970053549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=why+is+co2+heavier+than+airPDF link annotation
    • 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_off00022b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00024365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24365 10576 bytes
SHA-256: d83a152ad2ff8e3a79daba71912d48425817d6ed8daaafd7926ca7c9b9178db0
font_02_sfnt_off00025b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B9F 20976 bytes
SHA-256: aa7125d7a35db737b7a5e7669d8cc12f54893db1f165f4abb65dc5a0f948bf2a

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