Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fa30b697c0ebba…

MALICIOUS

PDF

80.8 KB Created: 2021-09-24 10:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b6cf87246150ca6aa603209a102e3be SHA-1: d89ff986e47e8968431988bfbc17db5f81f0e8ec SHA-256: 87fa30b697c0ebba9ee3edd9f5f57fbc6b77cef4f7b575d062e736f1cb8c5d46
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://medvor.ru/uplcv?utm_term=pogramas+de+android
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/musipevavezawaz.pdf
    • https://laughteronlineuniversity.com/images/upload/files/duburojisodorusobizapi.pdf
    • http://dentalweek.eu/userfiles/files/9726504013.pdf
    • http://mlsconsulting.net/cms/files/File/79962347108.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/161306f98cf882---kevulitepesasakem.pdf
    • http://probeg2000.ru/files/userfiles/files/galuzopawiki.pdf
    • http://cerrutistudio.eu/userfiles/files/gimeruzu.pdf
    • http://www.urbanwaterways.info/files/lixetate.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/50623175580.pdf
    • http://outspokenholland.com/userfiles/fckFile/20210922224941.pdf
    • https://tjp2-hotlink-j3t.com/contents/files/8141456758.pdf
    • http://rococosofa.com/files/files/47538126551.pdf
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/61100975885.pdf
    • http://namjapizza.com/app/webroot/files/29103918181.pdf
    • https://ka-base.no/images_students/files/deruj.pdf
    • http://espwireless.net/uploads/file/15163491991.pdf
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/56096668274.pdf
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/lifevufowexagoxojaredima.pdf
    • https://fiscconsulting.com/userfiles/file/fekalisas.pdf
    • http://lachina.cn/upload/file/18897692747.pdf
    • http://d2dgroup.net/upload/files/21651636584.pdf
    • http://mundori.com/js/ckfinder/userfiles/files/kitizaxabexuxi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d760.bin
9596de6c8127242b954856b7e59e5e3e960dc4b84a15bae1c9718480039db1b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD760 18812 bytes
font_01_sfnt_off00010640.bin
9fc0e26a68af7f226ccb94559db809387cb210c1cb6c6f178eef3fcc4096de01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 10448 bytes
font_02_sfnt_off00011dbc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBC 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.