Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c11c8574dc32ab3…

MALICIOUS

PDF

76.8 KB Created: 2021-09-16 03:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0defa0fff1a9bb7429c2f5c9d14cd81a SHA-1: 16e398b32f72324ce9d0d236d39835a7d6ec0046 SHA-256: 0c11c8574dc32ab341ac0cf05c34f0bbbd13f3f633cbe064b62fd31ca4190e29
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://coretry.ru/uplcv?utm_term=kingsman+2+streaming+fr PDF link annotation
    • http://caydinhlang.net/userfiles/image/file/zuvanikagizonodazajogava.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/43324536313.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161408b19d9474---61162374275.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/menilobesag.pdfIn PDF document text
    • http://bienbao.org/uploads/files/razumu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161426b0d083d7---16586394878.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/degivev.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/liginosetodalodosilixafi.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/99339103253.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/zuvetawejag.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/jodozu.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/susudobifejejetopijaxi.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/xitoxunu.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/fafiguwaku.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/65476377220.pdfIn PDF document text
    • https://obrbikes.com/files/files/22066025005.pdfIn PDF document text
    • http://laserinnsbruck.com/static/xopamenobututebukize.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/nusogazosofagogusuvepimeg.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/54557406711.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/97984543096.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/lexifugunawikawodiwezo.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_off0000c9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 17100 bytes
SHA-256: f530928177bda3fb3ee3d00c9b1c943ceeb261f860ded8b44a0e42713d217dde
font_02_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 10504 bytes
SHA-256: 2615441747cf7e2421616a239655e33a2d25d9aeb8ddd35e90e5f0027e56b8cf

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