Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7320b446d059199…

MALICIOUS

PDF

82.3 KB Created: 2021-09-20 19:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91c04749b94b23c3ab1eb952d9dc495f SHA-1: b49076a6315954fa4649197f52f0bd0e6ccb1103 SHA-256: e7320b446d0591996c6df5771562b064b6f731924aced25b146a231eccbc2f70
174 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to open a password-protected archive, a common tactic to bypass security scanning. ClamAV detection and ML classification further indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=fifa+20+iso+file+for+ppsspp
    • http://pokwuttibut.com/file_media/file_image/file/6840656144.pdf
    • https://workinhotel.com/upload/fckfile/vesajixa.pdf
    • http://dxqzx.com/ckfinder/userfiles/files/20210915_151638.pdf
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/47340620963.pdf
    • https://cultureresortpokhara.com/assets/userfiles/files/30607319105.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16143e7767d8c1---gameza.pdf
    • https://groupekheidri.com/ckfinder/userfiles/files/nejuxafedijetosik.pdf
    • http://patronusalapitvany.hu/public_html/upload/zapevovutujebetidewuj.pdf
    • https://juhaszautovill.hu/userfiles/file/42913617083.pdf
    • http://volkshilfe-ktn.at/images/content/files/vazobikurumokadorovefo.pdf
    • http://ghinelliarchitettura.it/userfiles/files/13054992343.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/85712992126.pdf
    • http://greddy.com/admin/common/ckfinder/userfiles/File/40633040101.pdf
    • https://aonetreks.com/uploads/file/53497312835.pdf
    • http://aliceinformaticasrl.com/user/pages/59921446973.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/sekegilivabokizepime.pdf
    • http://tubemakingmachine.com/uploadfile/files/8483792212.pdf
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/nererikelenu.pdf
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/xizovuwujagazobudasazaru.pdf
    • http://shinaval.ru/userfiles/file/kukiwupo.pdf
    • http://didopack.com/files/50154576203.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135294568bcb---puzitajilapizonusomubuza.pdf
    • http://orderbestwings.com/uploads/files/penidajifelaxigek.pdf
    • http://bige.vn/uploads/userfiles/file/difibuw.pdf
    • http://auxerretv.com/content/public/file/73019295168.pdf
    • https://xn--nmqu14inmf.com/upload/files/48897536787.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_off0000dc24.bin
e708bbadd13fac7da3c96017c193a61e080f36c31e568e92f86d87319f0e1966		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 10368 bytes
font_01_sfnt_off0000f3ae.bin
581964a16d8e90ee3cd23ee24d20ee24db33297abe7a448a2409e9d675587f93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AE 18408 bytes
font_02_sfnt_off000123af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123AF 16792 bytes

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