Malicious PDF — malware analysis report

Static analysis result for SHA-256 2384365eb6598115…

MALICIOUS

PDF

88.7 KB Created: 2021-09-21 21:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c20e4c79a993c30a2484a7419aaf1a77 SHA-1: 1a0c1dbce1e59cdd284991f7db6157b484edf4cb SHA-256: 2384365eb6598115832563a882282c6fa54fda99ee26a63c15a546b835d156c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and external URIs suggests the document is designed to exploit vulnerabilities or redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam, where the user is prompted to call a number, likely to extract sensitive information or money.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://oniceh.ru/uplcv?utm_term=kafan+munshi+premchand+pdf PDF link annotation
    • http://synergyproperty.com/images/files/18529271873.pdfIn PDF document text
    • http://usmleworkout.com/files/file/53802290178.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/84732921885.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/71411235578.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161396946301e3---lofepuwopamewep.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/55160254756.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/duzolamaraseworimobobiwuf.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/dosigidir.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/fopifagopimad.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/donunuleze.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/22170110061.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/33546817637.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/46207855912.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/30351068362.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/zafuves.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/sikikilokalilupal.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d394c31e5---80703234562.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/97673305275.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021091922004973499.pdfIn PDF document text
    • https://bloc-immo.com/images/36045602057.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/12487015958.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/8649559786.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/xiwosofa.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/34889376874.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_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 10712 bytes
SHA-256: ffb3a2a7fbb2899a216b96116fdc23a79a0c252029dc503e92840fbefa6a8c7e
font_01_sfnt_off00010ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12802 17372 bytes
SHA-256: 68ec9bc2179d9ac905e58364e02ca1c8381ab3d00a955e4f38a8bf6a6c693e30