Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd110eaa676b68b…

MALICIOUS

PDF

71.8 KB Created: 2021-09-19 02:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e052e3e915f6309a38714376ca9601d6 SHA-1: 63979418ad72fc1ba76b4aee4209ca1b0ef828b8 SHA-256: 2dd110eaa676b68b7d2437b4afb25d8f9443eafd077f4b30e7526cdaf54d0dd3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The presence of numerous external links, many pointing to disposable domains, suggests a link farm or phishing lure. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://lollanaclinic.com/image/upload/File/gakoferox.pdf In PDF document text
    • http://premiercontractinginc.com/files/file/nokoxilotadofi.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614523f5c765b---84477833968.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///2499132954.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/megexolutamoruduli.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/wetugomujizow.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/rikuzopaxawaretiwes.pdfIn PDF document text
    • http://nbc.ua/design/pic/file/16485932586.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/63392601854.pdfIn PDF document text
    • http://siddharpeedam.org/userfiles/file/In PDF document text
    • http://nawoo.net/userData/board/file/61762895233.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/80279428121.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/92323981711.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wetoxotimifu.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40863701853.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/lepowelo.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/6617716082.pdfIn PDF document text
    • https://85097781.com/upload/files/7432295037.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/dejodewusagunato.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/28004005323.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/mitotutakore.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/42464937573.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/36247812510.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/18767690296.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/kefipebiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=puzzles+%26+survival+apkPDF 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_off0000b8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EB 17216 bytes
SHA-256: 6728cbc45c82534676c72d1b9b1b8c2fcfc911084142b8f58f315e0e7e4b0322
font_01_sfnt_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD39 9580 bytes
SHA-256: b8f2295259c1034251d3935a21971e34e070e62428ab78f3975c6ff7e3543d9f