Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ecc338184c9e85…

MALICIOUS

PDF

84.8 KB Created: 2021-09-13 22:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c4001439d4b63358b871373439db1353 SHA-1: 211fcb1b6b8f95349fe520a6f66cd8de9d5edf7c SHA-256: 74ecc338184c9e854b57557d61e28acac60e32dc117da2bca81358761dacdfd4
164 Risk Score

Malware Insights

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

The sample is a PDF document containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The PDF also exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://eownauto.com/uploadpic/files/visuguxoguduxabineti.pdf In PDF document text
    • http://papienbanana.com/user_file/file/kuxujujudezixano.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/vazuledamusaju.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/30253137208.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/fojilixonafa.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/99826902018.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/36799447830.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/55794310654.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161339d1b34458---ruremirotisoxil.pdfIn PDF document text
    • http://glassick.com/userfiles/file/92573381074.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/161302fbc4dd5a---nezizegow.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/rumosilukoviju.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/82610686331.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210909084755.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/sizukuxetovuwibodapap.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/22840768353.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/6928805318.pdfIn PDF document text
    • http://e5tbr.alruaa.com/ckeditor-ckfinder-integration/uploads/files/85634905183.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/goziwofivukujek.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133adb020937---34528377241.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/96665dec53e89f5cde92e1b67bb7d661/12160723520.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/12646757792.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd1681e5eb---jupipetusa.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/70097376821.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/57164522264.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=vada+chennai+full+movie+download+tamilrockersPDF 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_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 11052 bytes
SHA-256: c8d00ef0b56739f41f4ef87400a7eab7e2ba9dd3a192bbbc4a9d895d792fc75b
font_01_sfnt_off0000ff3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 17772 bytes
SHA-256: 1ad42787185df7cfe32b549702e67641deef6a848a623dc5a81173bb217c20b6