Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8ce9fe8df94f65…

MALICIOUS

PDF

77.2 KB Created: 2021-04-02 00:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc0e2200ea765ed9d4feb2784f4f431 SHA-1: d1961528cd4fe54cab9ef6dd57afd87b0b9a5373 SHA-256: da8ce9fe8df94f6530a5a9a5e7d519e815aec9d4545e52123c81336769594b89
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are SEO-themed and point to potentially malicious domains. The document body, though heavily obfuscated, suggests a lure related to 'Time Warner Cable Staten Island channel guide', indicating a phishing or content-luring attempt. The presence of PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=time+warner+cable+staten+island+channel+guide
    • http://zimezobot.getenjoyment.net/machine_learning_for_dummies_youtube.pdf
    • https://cdn.sqhk.co/letinumi/gfgixgg/galarian_zigzagoon_weakness.pdf
    • https://joripipebepif.weebly.com/uploads/1/3/4/1/134131856/fejilorij.pdf
    • http://winoorama.website/emergency_severity_indexdz290.pdf
    • https://dovizitozul.weebly.com/uploads/1/3/1/4/131408131/nimezarafoxaruk-jebidugefopur.pdf
    • http://jabudapitu.scienceontheweb.net/cover_letter_for_internship_application.pdf
    • https://merirano.weebly.com/uploads/1/3/2/7/132710628/1b905689a5.pdf
    • http://pesale.pro/226969267598utkc.pdf
    • http://gedagefi.22web.org/57438407376.pdf
    • https://mivopolidenez.weebly.com/uploads/1/3/4/3/134349928/tidimaziz_vomeposifovo_fipuwajoxadazom.pdf
    • https://kufurana.weebly.com/uploads/1/3/1/4/131482954/b1a571.pdf
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/gumozive_malewufofi_vexopape_zijujez.pdf
    • http://setlyb.online/jvc_kd-r960bts_pairing_full4iqai.pdf
    • https://durosokikiw.weebly.com/uploads/1/3/1/3/131379956/d1bbd5.pdf
    • http://tehnotop.store/322580752507vrnb.pdf
    • http://kushtanash.ru/girl_boss_cast_nathan1t97p.pdf
    • https://xoludifatak.weebly.com/uploads/1/3/4/4/134477652/5282502.pdf
    • http://melomone.scienceontheweb.net/my_apple_icloud_storage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dodarululi.epizy.com/different_types_of_costing_methods.pdf
    • http://suzinukofam.epizy.com/sumbangan_kerajaan_bani_abbasiyah.pdf
    • http://bobixupeto.myartsonline.com/blue_bossa_jazz_piano.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc7.bin
aa9fae9f632e9b1d6e2e624259b95efe21071176c29bb897072d32eb9a62c454		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 5532 bytes
font_01_sfnt_off0000fe75.bin
cc04422fdeedf319b4c51a0dbb1831004e2169ca73dd2b640fb8c49e3f71c029		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 11888 bytes

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