Malicious PDF — malware analysis report

Static analysis result for SHA-256 6369091775829bfb…

MALICIOUS

PDF

75.6 KB Created: 2021-09-17 08:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 698c74461d3744e5e8ee4016533b040d SHA-1: aa45b654d3aa41748c69a39b528cf83418f8ae01 SHA-256: 6369091775829bfb2954d306a6176aebd5d2b48d25e1d791b77f904de7e3ef24
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. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to malicious sites or engage in phishing. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in callback phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://ketchas.ru/uplcv?utm_term=killing+me+softly+2002+full+movie+123movies PDF link annotation
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/a183425a41f72eefd15b632d48d68718/1308145800.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613142ca6a46e---koviwi.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/38598353840.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/93769327926.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/midekalimurodam.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/nelidisonebonawilexazija.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/88070711092.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/mofodeguzetapigezazajaje.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/26102657799.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/vikejivudiji.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/13978969780.pdfIn PDF document text
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/25198466629.pdfIn PDF document text
    • http://safetruck.gr/images/file/wadidif.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/66749754855.pdfIn PDF document text
    • http://7profi.net/userfiles/file/xetanonojamigesijapukinet.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/81594734947.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/begazifibiveletosaxamatig.pdfIn PDF document text
    • https://mimpishio.com/contents/files/21468902064.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/pirajuratutig.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/rovifufosago.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/32288296569.pdfIn PDF document text
    • https://filetorme.com/upload/files/mafiwekojadi.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/22692489744.pdfIn PDF document text
    • http://becucci.it/userfiles/files/sefuwumobera.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/50131204453.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/bifizexoxijutopepesav.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_off0000c179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC179 17140 bytes
SHA-256: 7be99fcd1f51d4afba0f6c0038d03bf558691e6741e1b3b48d0683c0b385b963
font_01_sfnt_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 11032 bytes
SHA-256: ff3917d8f7a977dc5a48050748e433ac6ecdad748744997abd060c26d7b3223d

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