Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d104f83f4aae262…

MALICIOUS

PDF

88.3 KB Created: 2021-02-27 00:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5fda9113e5e38a0759dff3bc7f83ec74 SHA-1: 7bb5fcf20770fe97f40f7130fc63233ac2fa647b SHA-256: 4d104f83f4aae262fe559f93196cc363b0a054f17588f0a48056f84a4e10af59
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL that leads to a suspicious domain, likely intended to host phishing content or a further payload. The document body, though heavily obfuscated, appears to reference COVID-19 travel restrictions, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=can+you+leave+the+state+of+michigan+during+covid+19 PDF link annotation
    • https://cdn.sqhk.co/gawagunikuw/8q7UzP6/flight_combat_simulator_games_for_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5fcb8facbfa12.pdfIn PDF document text
    • https://cdn.sqhk.co/ragebobeb/ahh5gdi/guidehouse_pwc_glassdoor.pdfIn PDF document text
    • https://cdn.sqhk.co/piwuzuberaze/uzihNhg/mouse_simulator_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wofamofupu/ahjxicr/xbox_game_console_history.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sitozi/rubosos.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/android_onedrive_sync_media_storage.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/greater_chennai_corporation_community_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/weather_report_ludhiana_today_hourly.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/meaning_of_android_in_english_language.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/nitepomulur.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/vector_art_design_cdr_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/90720861622.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/tuluteduripowesesigaz.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/27540979477.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C36 5708 bytes
SHA-256: 92da4069d6980fe50da5c0dd28536c325fa96f921307548662f8fcb9b1a39b18
font_01_sfnt_off00011f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 11200 bytes
SHA-256: 4e426218f637fc872828d96a615f62707229762ef4a6411f71bf7959cca6f946
font_02_sfnt_off0001459d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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