Malicious PDF — malware analysis report

Static analysis result for SHA-256 c060f89d5cfa819a…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 18:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe4e3e6ce2282b85652f9bd20e6e9bc0 SHA-1: 67aa259dc0086b7955ddd060bf570f73d4edc55b SHA-256: c060f89d5cfa819aa2b9d72fca75b8da9d6ce8ef957bb957e0b5ec3a4d5336af
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, such as the identified `https://drafthe.ru/uplcv?utm_term=among+us+32+bit+download`, which are associated with phishing or malware distribution. The heuristic firings and ClamAV detection strongly indicate malicious intent, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://drafthe.ru/uplcv?utm_term=among+us+32+bit+download PDF link annotation
    • http://aguito.madteam.net/ckfinder/userfiles/files/xapibewilugivifumami.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/xodufixexiruxowoditunu.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/91485858086.pdfIn PDF document text
    • https://gulamanis.com/contents/files/jagatijenib.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/95053486823.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/75028458891.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/53142261599.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/34741150311.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/c114fbe8a541onjbtjdbp6i4vq/jegisene.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/buwapafenulesuwinejegizel.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/fomefeweto.pdfIn PDF document text
    • http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/90675835223.pdfIn PDF document text
    • https://777mto.info/contents/files/97867015902.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/17412380821.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/kopekezemiro.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/wavawulutidajigojamobujef.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/jedatikijubiwaro.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/61876781726.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/fireso.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614125e4c19a3.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/51079288981.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_off0000ae84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE84 15472 bytes
SHA-256: 5cd2f61819d19c6416e6a03b12ad431140af22310ddcdb89961a8e947186a9e2
font_01_sfnt_off0000d4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FD 10960 bytes
SHA-256: f4869179e1f8760ec91ed46024ae5c820df4aa8e64dd7007e7e6c324fc016a6a
font_02_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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