Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f64f8c0513bf20…

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 00:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 68646558788e6852ea11d09657318e3f SHA-1: d1cbe222e27d9b9d62847e63793cce587b21e945 SHA-256: 17f64f8c0513bf2017c219a8b7709c0a9fbe5cfc54e36f5e67f3b508c5a1de93
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to external websites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=galaxy+s6+reset+button PDF link annotation
    • http://asea-admin.com/_userfiles/file/20210908065839.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/93700806124.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/fipixanonibetitoxovofoz.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/99774429305.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/17973634421.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/27315425921.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/81259603917.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/xogeferovuf.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/77286086970.pdfIn PDF document text
    • http://santehnika34.ru/images/file/dugerojizej.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/vemigemefosekimisotira.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/27510752741.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/22640025229.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/kituvuwimujijes.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16137b4992e0ef---44424138409.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d698227b2e8238861df2e993a5f7ae6/zapibode.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/bevifusepovo.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/rakaxitujanaxolowisalipe.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/jewuzagevefiko.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a891996d4f---51625073248.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/79750200048.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/tofasomomonulodida.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/rodof.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/6796476913.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/23900414735.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_off0000dcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD8 10672 bytes
SHA-256: 8ed428b136a8276cb88eff0a73febc3ff79e263fe1f34cef723f10c5fbaac7a3
font_01_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA5 18956 bytes
SHA-256: e45cf4e4bec7284c12590361d47a15e84933faa1e41279afbfc0f18204ca3c94

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