Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0a66c3353f298f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-11 11:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f284bff6d313e72d0d084c7135fa4949 SHA-1: 7254d6b9970d1150cc8c7a77d575dea660f7f1d3 SHA-256: be0a66c3353f298f02341a6ec52c814833326e00719489745b6962ae8a03bc00
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external links, many pointing to unknown or potentially malicious domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, and the ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common method for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/764158b08eca8ab786c3e500c3c5cb02/pijilimujafefeke.pdf In PDF document text
    • https://argumentua.com/i/file/71325490456.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/6537366812.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/memuporilirikaseguza.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/parerefenixafebujekone.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/18481758382.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/zamulitaximawasogediriji.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/59827018825.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/tabamebawupomorodotopat.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/guxanonikone.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/puzif.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/40379938547.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/nubomeluguvagufibaxod.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/kizisis.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/bipejejuwabavilexom.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/64668060421.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/31743698077.pdfIn PDF document text
    • http://vuason.vn/upload/files/31665963116.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/83832822119.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3248140fb---migekavilakosokutipejariv.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/92713374452.pdfIn PDF document text
    • https://blv.by/upload/editor/files/bajavurorejutiveje.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/sidufe.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/fuzunirumasitokebida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=venom+full+movie+free+onlinePDF link annotation
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/piminaj.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_off0000d66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 10080 bytes
SHA-256: 00631d4365391e34d2c0b4dcccb6e912c70ec326f32021420a481b9f62a68e33
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 17336 bytes
SHA-256: 5e5aca49469fc565f419ea11c96a7e1807668cf78ca4e175b1c23b5dca85bf40
font_02_sfnt_off000118e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1