Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0ddb8660e75fb9…

MALICIOUS

PDF

71.1 KB Created: 2021-09-22 22:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 38534e1a0402846974c80898497d3eb5 SHA-1: d6db9323980f1d22d3f453f36c2647dbaad4b39b SHA-256: eb0ddb8660e75fb9d9715ed626465fdb29e083da136e23379c5697bcc99f336d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious content. The presence of embedded URLs suggests the document is designed to facilitate the download or redirection to further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=the+meg+full+movie+in+tamil PDF link annotation
    • http://zbraneklapka.cz/ckfinder/userfiles/files/tonofenikijaw.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/tiderojodexebibudoxalodu.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210908204521.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/11176259736.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/80960270588.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/41585548349.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11762103832.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/63787869167.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/tixig.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/9681027046.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/nemulomisifurametumi.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/73566156964.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/69378426450.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/fopiwazapowilonabipagex.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/56705199073.pdfIn PDF document text
    • https://edusfera.pl/upload/file/jukebomaladav.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/59827836019.pdfIn PDF document text
    • http://sciattella.net/images/file/vedutisiso.pdfIn PDF document text
    • http://suurelepa.ee/data/file/molatujufajurunabibezuzu.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614752774c67a---39753447537.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/17889531527.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_off0000b287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA99 17404 bytes
SHA-256: 700f952fabeb60860324fa96bf11b5e59cfe5794319392c5e328a332f8cd9d0d
font_02_sfnt_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 10524 bytes
SHA-256: 834918d0a129207c2fe071dd015c34559d2f409ddbd8b83523e0d30e809e4630

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