Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06e0b7330fe5b07…

MALICIOUS

PDF

87.0 KB Created: 2021-09-18 08:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9d26d4eb0c6c725ab5b79f6c2799c4b6 SHA-1: d3afbc067d89766b20e7652d0f2215f47956eebc SHA-256: a06e0b7330fe5b07bdafc745181ea774c5f678b81faf540bc382116dbe7ffbab
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier strongly flagged this PDF as malicious, and the presence of JavaScript suggests an attempt to execute malicious code or redirect the user to a malicious site. The primary lure appears to be a link farm designed to distribute further payloads or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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://infrive.ru/uplcv?utm_term=money+manager+apk+pro PDF link annotation
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/jonalezojetedu.pdfIn PDF document text
    • https://equimat-cheval.fr/file/puredo.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/81757317082.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2109161408077321147gdm7z.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/2952804342.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/39670970068.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/a7848d8ce72ad92c4b4851b1c3578ffb/89928455292.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///dipubemirinevefijaba.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/simaxomar.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/magivisiluwas.pdfIn PDF document text
    • http://mebco.ru/images/file/kobebabevero.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/zinivixafipamufawiramunev.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/kusexirenunisojibowogi.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/6114336852.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/1l23im18hue8lu7dfj7qbjs8g4/pomolokesemikukurez.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210911_1661C8133BDA21D6.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/zalud.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/wafuresukuziwerole.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/sixomatuladewugunoxo.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/86843869367.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/lujutubogan.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/kopexugemejetedudugovifud.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_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001061c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061C 18820 bytes
SHA-256: f653ccf38669dc5940c2cc98bf8f1f72abb6e3abac344f9138ce525da8b5e974
font_02_sfnt_off00013727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13727 10388 bytes
SHA-256: 939a5a994a47ee2a188579b2c048dff73bb81910e4b13b506ae2f9dcb1062a89