Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29210ac2ff8df2b…

MALICIOUS

PDF

83.6 KB Created: 2021-09-19 11:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a0797315f4265731a19a450204c5c944 SHA-1: 1a30898c63772e4d6c8df3850d0a13a3d39ec0fa SHA-256: e29210ac2ff8df2b7f2242c81a563ae9274cd05880feaffee547b3a057608fe2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is a link farm, and many external URLs are present, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.alapan.org/fckimages/file/putiduropid.pdf In PDF document text
    • http://garage-fuji.jp/js/upload/files/belaponajuxekinevasoxa.pdfIn PDF document text
    • https://baptistfriends.org/media/gozab.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210912011920.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60442303533.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/13549387304.pdfIn PDF document text
    • http://recviem.ru/img/upload/93568041186.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/kupofejalawubotifeda.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/49da14c08c85b5f6b9259b414e7d2305.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/fusife.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/31422652795.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/mhv9ldpfqjmb9lo5qq27v2ubdj/68015803908.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/15419676483.pdfIn PDF document text
    • http://centromp.it/userfiles/files/46055403576.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/96051138498.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/tixogamipasemebatan.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/95575595798.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/japogatavataxugovo.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/13158475738.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/13728312726.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/tudik.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/dusotaluzofapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sindh+driving+license+feePDF 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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 18160 bytes
SHA-256: ed94e8055d1c2f0b7fc8ea70fb5f1f1b4544da59abb767b4b30a4591b4c98dca
font_01_sfnt_off00011177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11177 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001298e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298E 10516 bytes
SHA-256: f251633da30f3d202746472d2834e628da29c6d76d0445b37fc385e8f61a25ec

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