Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08bdd4ed609d8b1…

MALICIOUS

PDF

85.2 KB Created: 2021-07-15 13:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a95249ea8c9659c284fffa47ac5d87e3 SHA-1: 4e3950aa82852fd6984cdb52cdaa43993edd22be SHA-256: f08bdd4ed609d8b1c4ee559695f1162e797a6d59c5b831db5f90f459c7219a6d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://fairway.cc/images/blog//file/61798658851.pdf In PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/9c515156b09558498784fcd6ebde201f/kepemefeponeguba.pdfIn PDF document text
    • http://envigest.cz/upload/file/vuwatutiloduko.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/gikagudumegozeper.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210613_9B3BBBDD02DAC4AD.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/meboviwezipopuvopufewup.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/81536819240.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/nikigofafogefuluwu.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/n779lsfnhh4brqn680shda60j4/pawabavalepirurudif.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/99446549995.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160defca13ba50---28083114768.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/18484032671.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7aadeb22466d29d87b95c7bd7efa84d2/saxomaresubepuniwogediri.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/pirijotazibeged.pdfIn PDF document text
    • http://www.520amis.com/upload/files/27936814613.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/savi51j09auuqpcpfmi8cvn3c7/jeduwodo.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0134c748d4---37057180760.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/nfpg3ndsmme7hjih35q8i15p0p/73390961051.pdfIn PDF document text
    • http://zuche0551.com/upload/file/piremupipulerilu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01cfeea16d---kopejujok.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/7fd34ff9576ca207455b8b6daff1195d/28189092358.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a820c3d9379---85244380975.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/qs5d2n5k5tm4ofmlq9feh8v295/20364385063.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160822406e509c---14526182776.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/23tf5dn90k0oh87fu492q17csf/kozobulusoroju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=1+cup+rice+1+cup+waterPDF 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_off0000edb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 10072 bytes
SHA-256: 6de60d04104154b4f218cc5ecae522fe21017ec28182ac42a9efe372bf74b743
font_02_sfnt_off00011c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C69 16692 bytes
SHA-256: c61f769e3da03ce03ffc991af6907812bb4b58b16a558ac732d31d6afc1cd85c