Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e2ccc92ce9898a…

MALICIOUS

PDF

74.1 KB Created: 2021-09-13 18:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eef7a3c042d171cdf6d290efe1e5c520 SHA-1: ae3c37a898b9309cb7250d5c68205774b4b8f4a1 SHA-256: 63e2ccc92ce9898a8db3585564bb11e7eb76c04961bf7c15989cc0b0af23c404
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://factblogs.com/uploaded_files/userfiles/files/rekuwaze.pdf In PDF document text
    • http://hbaoge.com/upload/files/kugovobameguzawidi.pdfIn PDF document text
    • http://zae.me/datafiles/file/sogofu.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/77144822944.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/wanor.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/73873092762.pdfIn PDF document text
    • http://csigikes.hu/admin/fck_upload/file/voxalifekabufozegowos.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/26248782904.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/55839160867.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/zokesuladojebajepisogo.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/vuxiperejexugibukividinal.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/fibutaxip.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/zenup.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/61215854304.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210909_070907_8965.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/difeburesino.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/58549223534.pdfIn PDF document text
    • http://cartopack.be/Images/file/43271816913.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/16798786893.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/mozotukamojalasipefe.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/38048444762.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/gujagoz.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/161354e6f39a77---godafafoxikero.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/jaten.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=paper+io+2+player+gamesPDF 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_off0000c060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC060 10628 bytes
SHA-256: 58876fe6ae418918e01d074a1a8a288b732876c2bdd0b4b52202b1f8d595ce59
font_01_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 16320 bytes
SHA-256: 7903b23c2821ce3093abc6e6929f90563f9c9ae536b2fe753befc017082d788d