Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5bfdf4f1a84df8…

MALICIOUS

PDF

85.4 KB Created: 2021-09-25 18:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 168607ebda5eda5b333fa7ebfde11405 SHA-1: 9d9478408775ef62f52f0e3f3de1bc73bd80e7ea SHA-256: ec5bfdf4f1a84df8b6da120e90f26eccbf00942dc2c08821c779ca2587819016
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to disposable domains, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to obfuscate the redirection or to exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://www.pattyn360.com/upload/forum/files/62201570693.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3d2be7a3f8775e921e68c59161b89887/54937316216.pdf
    • http://headrepublic.pl/images/files/8971040884.pdf
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/24820497924.pdf
    • http://karpatskiles.ru/store/files/lefajineriliwavo.pdf
    • http://poorclarescork.ie/images/fejidonige.pdf
    • http://tantos.jp/js/upload/files/50844864257.pdf
    • https://amrapalispot.com/userfiles/file/kovuwuxadolakek.pdf
    • https://defi128.phpascal.com/userfiles/files/pegewuzilekivopu.pdf
    • http://bolshunoff.ru/images/wysiwyg/file/rijuxebetikilodumozozesaw.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614d4f39c6872---denupimuxopovadav.pdf
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/xixus.pdf
    • http://www.romanschatztruhe.de/img/files/52952512682.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/41388051544.pdf
    • http://dalnoboy.org/data/filestorage/upload/files/80788548997.pdf
    • http://pokorny-podlahy.cz/UserFiles/File/pawifimak.pdf
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/xoxonafesugu.pdf
    • http://tuyothuyluc.vn/webroot/img/files/lufulivariviga.pdf
    • https://soportedevida.mx/ckfinder/userfiles/files/fexupiva.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/tonitekizejiwone.pdf
    • http://satakantaresort.com/user_img/files/80813349552.pdf
    • https://vico-real-estate.com/ckfinder/userfiles/files/sixudozotiva.pdf
    • https://www.tvmreza.tv/ckfinder/userfiles/files/25999003642.pdf
    • http://toanthinh.vn/webroot/img/files/56500154991.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=%D0%BF%D1%80%D0%BE%D1%88%D0%B8%D0%B2%D0%BA%D0%B8+%D0%B4%D0%BB%D1%8F+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba21.bin
ddfeb14fd07181feb78e5125254b7d3545262116ab45bda2b60bd3d0004885be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA21 25212 bytes
font_01_sfnt_off0000f870.bin
da3599785d691edba6bb1dc804d5dbf9cdb050cf7bdfa967d514dff539c0bfb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 16132 bytes
font_02_sfnt_off00010de0.bin
356d467a1565313679b2a164acd3f7c2b408783056c4ff879ccd9964c1ea5758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 10316 bytes
font_03_sfnt_off000124ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124ED 16792 bytes
font_04_sfnt_off00013cfa.bin
c737c1571b827a9af515084efd4d135d2c05ce8763284746c5506df3322eddb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFA 1664 bytes

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