Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c96b3e9831c1dc…

MALICIOUS

PDF

82.6 KB Created: 2021-09-09 09:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: d6235fc7a6119aa3537cd9993ba56756 SHA-1: 8fe51ed3ca223e541238096eda081b2553020d99 SHA-256: f0c96b3e9831c1dc0cac1b5fa9d4a19c99470f6fc1c374f7f20a98153e8b12db
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=how+to+save+snapchat+photos+to+phone+gallery PDF link annotation
    • http://gospelpour100voix.com/fichiers/newsletter/file/49533188916.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/demozekugebikogi.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/xakovasowadetamem.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/nozokezaliwegafawuvisiv.pdfIn PDF document text
    • http://cochemical.com/upload/files/fozojipaloxowenujoduzesa.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/93154656378.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/zezukurizuvomotuwafeta.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613859df06067---pawoxoxifoda.pdfIn PDF document text
    • http://tecksco.com/upload/files/moraxalisorusu.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/baxadorenadixaxob.pdfIn PDF document text
    • https://festacontinua.it/public/file/fepevumos.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/sowowobunixupowenujot.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/49316342574.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/sigapezewoke.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/48702289834.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/80939360695.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/sukamonirol.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/zozizurufusixajomevavedar.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/67428886669.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/55094908961.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/tobewepefivusipadaj.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///12776082324.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/tixewedosizolufibe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 10820 bytes
SHA-256: 82ea1b88718253ad7c17e58c782bb0d5b888d3847a6bfc88f702211597e2c3a9
font_01_sfnt_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 18512 bytes
SHA-256: dbc6ac6b464e5d888f82cb6bd63af70182417eed284cebd743a1ab2c4f7de84b
font_02_sfnt_off00012469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12469 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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