Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef49372aa566eb3c…

MALICIOUS

PDF

87.8 KB Created: 2021-09-04 06:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5d04d33c17f6473257bd306377dbafeb SHA-1: 20ee54a95d7ba2867e5190060ec00494fa43fcac SHA-256: ef49372aa566eb3c12be0906c227bea8c1d48dc5c16b480044f6600006260220
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://medvor.ru/uplcv?utm_term=practices+of+islam+pdf PDF link annotation
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b325ff22243---patagizewer.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/nabijonisubujabubezo.pdfIn PDF document text
    • http://espokebar.com/uploads/files/gumubenizewuxaka.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/68616192836.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42949041321.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/taxonumese.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/73846893788.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/97910641980.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b8c7b42bd0e8cfe741b2876fa8ea7551/vekobevasolevegopisamivo.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/rizevovat.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cab5a530a66dc956217ed8e03237f4f/difogufew.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/36149721742.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/35832604350.pdfIn PDF document text
    • https://arerp.kr/data/file///84695084093.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607835613b62e---degidatumugavana.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/zudomudebibukuguma.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/kavik.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab68d75701---30461906934.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b3610b31e---molerawoguduweza.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/41139827440.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/60910144797.pdfIn PDF document text
    • http://hainfelderteich.at/tawufotexeti.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/5l7h7mokvsmf3mm4of9devu44i/65936455099.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/85952748128.pdfIn PDF document text
    • 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_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 19656 bytes
SHA-256: 29d0480a4c234059f9f428663d7e37681ff6177827b181deb8f92a8c4d39bb18
font_02_sfnt_off000139b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B2 10680 bytes
SHA-256: 2c5ccfe45c068bd4a63336d341453628fafc0a110c1f78771ca4fe7a9236122d

Open this report in the interactive analyzer, or submit your own file for analysis.