Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5dada2fafe4c0ad…

MALICIOUS

PDF

72.8 KB Created: 2021-11-13 09:34:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: eea0cabffec4ac01d6eaaf72e459d49f SHA-1: 244e42aaf5f7c9491daba87ab6a8be98f2679779 SHA-256: e5dada2fafe4c0adaa65662cfe77e8a4b553e16754feea255b0cd59d1fd1f9f3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates that the document is designed to redirect users to a large number of distinct, potentially disposable hosts. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://pijntherapie.be/uploads/files/42684571334.pdf In PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/0644849efa5bf6c7a6bafd5d80e58875/87664606049.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/wifusi.pdfIn PDF document text
    • http://fittbikese.hu/files/file/48872865810.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/giwakemu.pdfIn PDF document text
    • http://ocung.net/img/files/lozodo.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/96295423834.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/kepipatulabovuw.pdfIn PDF document text
    • http://underbutter.cz/download/foto/zopobojifobaxidufova.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/58360153408.pdfIn PDF document text
    • http://rem-stroymont.ru/img/file/43559171107.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/741924728d7050e2c7bd58468ac95c38/47370319229.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/97714176475.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/feragu.pdfIn PDF document text
    • https://avenue102.com/uploads/file/59347972559.pdfIn PDF document text
    • https://pitbulllocksmith.com/nbloom/fckuploads/file/nekabojitaladezivido.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/19437867964.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/vefifomuz.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/45847956421.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/gijelomebabox.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/xesamexezoxekinuwuvedip.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/35773897290.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/68185875589.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/D9plVHj2VOU/uplcv?utm_term=on+the+fiddle+meaningPDF 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_off0000b530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB530 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off0000cc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC51 19348 bytes
SHA-256: bf51cc1ac8d71b4e3749aeb56c262d8c13b5c68e3f3f37f168c3c2378ce18bba
font_02_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 10440 bytes
SHA-256: 76606b2ace031b8cb3aa8c9d20befc69398010d6abe65a8e431f01d4d5287fa9

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