Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf825412211d4732…

MALICIOUS

PDF

80.5 KB Created: 2021-08-24 22:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4d12d1773dfceb644622b77082d0f419 SHA-1: ceb7438c26b5c0ec5926b076f623049124d10831 SHA-256: cf825412211d4732c1fdf6eb18f96740c128be9cad8df00a72ffff35f26cc1fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The primary goal appears to be leading users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5408

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://archerelectricsupply.com/userfiles/file/sugipiki.pdf In PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/jafav.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/2jp4qiklp4jufkiq3bj5q95hv9/pulasonujuzuzuzojipu.pdfIn PDF document text
    • http://bociany.sk/media/file/mijomerowodev.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/delujofikamisibisitanator.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/9d2181822ae8c8bdac3a45688997f8f4/84844471792.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/jadusubufiguzefag.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/3729983015.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/danotizefudafarugamilus.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/dodapomarufinu.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/71550787111.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/xatopigunepewa.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/molifefug.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/24425197692.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/8322273839.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/19481301343.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/gegojizinipuvalivu.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/jawisunirubemunidixodo.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/67374796880.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f5e0189f7---65005359836.pdfIn PDF document text
    • http://co-mit.com/uploads/files/48796230229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=anti+rabies+vaccine+for+dogs+pricePDF 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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 16724 bytes
SHA-256: 16cee1f55aa6b4e2f420ce5300c380de8b9ee3e435859535619d6c1e61e6fa55
font_01_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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