Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbd68017e6a410a…

MALICIOUS

PDF

81.0 KB Created: 2021-02-27 14:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b923f4fe78ed8fc97d281f90b03550ac SHA-1: 1c8defe78529fdfa7223b5824e5b56a9868780b5 SHA-256: 5cbd68017e6a410a3151b94374940fd4c9f36825da121f84be9e806225a05b41
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect users to a phishing or malware download site. The document body, though heavily obfuscated, suggests a lure related to a literary work, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://resalured.ru/strik?utm_term=lectura+las+medias+de+los+flamencos+horacio+quiroga PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5fd31d836ec54.pdfIn PDF document text
    • http://zozomerolam.22web.org/analtica_web.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/hjQihgi/happy_wheels_download_pc_steam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_60381fd529906.pdfIn PDF document text
    • http://insurancecarusa.com/wrt160n_default_user_and_password5y076.pdfIn PDF document text
    • http://helpverifybadges.com/letidibedabisughafn1.pdfIn PDF document text
    • http://wersita.space/661135560215y7nb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408195/normal_5ff615827febd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5fd04ab9de3b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wewiro/beyoung_shopping_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/72299969296.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/46313567907.pdfIn PDF document text
    • http://nodezolejew.epizy.com/75662894709.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/pevekirupakutifugizaguga.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/employee_insubordination_write_up_template.pdfIn PDF document text
    • http://kesobikifa.epizy.com/8446112242.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/questionnaire_likert_scale_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/61846061290.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 5500 bytes
SHA-256: 3a1b9fc2a98b7bb5e2ca4dd17eeca2943e5491e7d74406639565bc718332676f
font_01_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 11988 bytes
SHA-256: 5e8f9c77e2fa33438e643d5d11c021c79de2352b1bc3135031b1bd7ed41dea88

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