Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b48c7f160dd27a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 12:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f54f8fa57c19f20ac0c433cf6b34fbfe SHA-1: 3fdd4fc62cc358b5f5b07df072ef8b1b4d01e032 SHA-256: d0b48c7f160dd27abbf95be674cdffb1d6e2702b5b0bad195c673f0e60479f1c
66 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of distinct hosts and links, suggesting an attempt to distribute malicious content or phish for information. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • 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://emenu.hu/editor_up/11473765402.pdf In PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/48115013357.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/pipobovajuxukovevori.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/jugopivizovibarog.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353373898c2---vofenemewapoli.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/dilevuturupoxenax.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/37131574682.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/lituzidafizusuvolexosew.pdfIn PDF document text
    • http://nature-revive.org/files/file/12443459448.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/10770682211.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/laxefupuzeb.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ca64587f97660b4ca9580d1c95de1bb8/mojevilegogezesolulu.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/metekaxoxivol.pdfIn PDF document text
    • https://keongracun.org/contents/files/56563024822.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/palironosifata.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/pomejojanubopudike.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/97128354941.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/54350581800.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/14643627566.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/40392851086.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/56266825309.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/81228375758.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/jafuzetikil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=anime+lovers+apk+downloadPDF 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_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 10680 bytes
SHA-256: cce655828470f6fe44797782537be6b03c8261cfce86b13a79a3a8749ac65ba1
font_02_sfnt_off00010cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 17456 bytes
SHA-256: f3113b3b6366b177bcb618e0e5a80b84494c0466b65fa6b9d2c715fe6a6981d7