Malicious PDF — malware analysis report

Static analysis result for SHA-256 32abff3120a084e2…

MALICIOUS

PDF

78.9 KB Created: 2021-08-08 03:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c96705a3026baa9fddc0c433ce19aedd SHA-1: 5d669652bc86431d9e99d67d479c59a387b5ea0c SHA-256: 32abff3120a084e23931d54af151e7362fc8ef38e30dbdf23cf4a29b30cd24bc
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit users through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • 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 https://georeno.ca/userfiles/files/paferezakupelu.pdf In PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/nexezoganewulekiwawafiku.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/f20e1b5f059b8ab40e2bcc69ba4697e2/86372867647.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/bowumipat.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/71315276340.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3383cd0d66---zaxowamodifumuzojewe.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2adb567bc0---31121979149.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/10925531510.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/j4dlpai4vgadg9cvhsfb6tcku7/74273276704.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/e7e7a77d14c223305971c0ab9d515886/6610052335.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/53766844433.pdfIn PDF document text
    • http://huntland.hu/upload/file/jugisomo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/17ba0ce6fdf98e3a9a8dfb4bad411893/96255758618.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/33976591030.pdfIn PDF document text
    • http://hotechike.com/files/files/91134181236.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/56146569568.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/mimemuvigexuputixurijafux.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2476765df3a11e7e24436e2ece739652/44735641775.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/wawatelub.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7202968e7b64752facaa4b00bf3b68a2/42214229454.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/16990178717.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088ce229d3d6---sumizisasaf.pdfIn PDF document text
    • http://amdind.com/userfiles/file/vosavor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=ejercicios+de+peso+molecular+resueltosPDF 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_off0000cca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 10784 bytes
SHA-256: f443690c6969942e21130228d063df6f6fbff181c43c72509873af6497be2ca1
font_01_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 18680 bytes
SHA-256: eb95ddb7cf862bb166d12eb32eec3ab5fb84e0c3ca2938b5620c80a3a6879631

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