Malicious PDF — malware analysis report

Static analysis result for SHA-256 9618d9dad114ac28…

MALICIOUS

PDF

73.7 KB Created: 2021-09-11 02:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 93a77bcc47c6207d969c0e684c0714bf SHA-1: b9d0dc02546e6d7156f64bdbd4aa30d583d2d3b1 SHA-256: 9618d9dad114ac2857ff94733719f30c8aebadcb6d546ae52d0c88395dce2d8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm, likely to distribute malicious content or phish users. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://garglob.ru/uplcv?utm_term=steve+jobs+book+in+gujarati+pdf PDF link annotation
    • http://vncdata.net/app/webroot/uploads/files/65420695683.pdfIn PDF document text
    • http://fbrasil.com/userfiles/file///sanupumozu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f3663883ba2aa9f5960452a51a328464/ralutifajatajipa.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/jonibuvab.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/12899956701.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/14186839898.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/64007997497.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/vusinevag.pdfIn PDF document text
    • http://xuanfe.com/uploads/FCKeditor/file/nemanavesinovofawawebufig.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/81463498634.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/87305517861.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/69059589859.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/17354147164.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/zevatirateteloniniwe.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/dubazaninugefajabu.pdfIn PDF document text
    • http://cpviettin.com/upload/files/17390428797.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/37830670935.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361986dc2dc---11277046141.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/90356424589.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/fobebesimo.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/dodovoviragapuwulowodafek.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/16016740710.pdfIn PDF document text
    • 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_off0000bb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37A 11232 bytes
SHA-256: fe17cc7dc5d0007eb7bd39fbdc220cd4dec5bd67827073764f9184133eac488b
font_02_sfnt_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 16708 bytes
SHA-256: 2f8d2716de11e2fd324159899ca4e22f10abf4c4b0d0e430be60156a55c1c19e

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