Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e4fa0b52692994…

MALICIOUS

PDF

70.8 KB Created: 2021-09-08 21:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dd2b49dfd97ec48edb895e19bb7efd37 SHA-1: e8ee8d09d2b92c77cc26b09a618dc83f7c75d686 SHA-256: c1e4fa0b52692994bab41a5b5de5007e3e4cbd59ae6cb63f9c7c952f2ec13214
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external links, many pointing to PDF files on unknown domains, further supports a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 http://aurangabadptti.com/ckeditor/ckfinder/userfiles/files/zapaborawejego.pdf In PDF document text
    • https://losungversorger.com/product/file/lixetur.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109062032236728.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/vovozov.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-1/20210901165348396920.pdfIn PDF document text
    • http://abc-tel.ru/data/File/vimegobulobabovijas.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/liveneleruvafuvolu.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/goxawawemelafatux.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef7cab4ea0---sevepukimunafotepawejesu.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/tumotideturawo.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/80148043602.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/51907728787.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/gefunigigurolog.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/34947879985.pdfIn PDF document text
    • http://nenorm.com/files/files/88010613423.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613165a836416---megasigakufuzaxanunaja.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/57256506068.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/jibol.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/zixasalajuresafe.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/juxewam.pdfIn PDF document text
    • http://cwpni.com/userData/ebizro_board/file/lumerimanugunuj.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/11519388258.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/93536043513.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/66054223535.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/nelodigakid.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/fumexug.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/reduzuwetuvoworavane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=rockworth+powertask+manualPDF 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_off0000b834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB834 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD046 14556 bytes
SHA-256: 01d8160043f76afe7da9ad7cbd29005b6aeaec34ccd2152f42135a31b0c84357
font_02_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 10872 bytes
SHA-256: 17580a88aa65be33f844eafc0101b7fcb5254c2ef5d6f65d6d782e3048cad520