Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b77605a11979f57…

MALICIOUS

PDF

69.5 KB Created: 2020-12-20 02:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 961a26e1257a628715f5347660f1fa2c SHA-1: 74865c74a374f8ba5297aa9712e51cef32913063 SHA-256: 7b77605a11979f575c19a081745dae9242910d14e8e267aa8bdc87595ac87a34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, specifically for brand-impersonation credential phishing. It contains embedded URLs that lead to external sites, one of which is associated with a phishing lure impersonating Facebook. The document body, though heavily obfuscated, contains references to 'Glacier bay 883 432 parts list' and 'wkhtmltopdf', suggesting a potential lure related to product information or a technical document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/9452531.pdf.
  • 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://trafffe.ru/strik?utm_term=glacier+bay+883+432+parts+list PDF link annotation
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/9452531.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/favaxam-sumodinuwumilet-taredij.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/7805a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/883c788d-d502-475c-9eed-9b84ea8dedb9/rukokaxeludekosezuvefuvov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf57364be903ae63fa0bd/1606219123536/xunit_test_patterns_gerard_meszaros.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc3585a3570fb44d16dcf81/1606637659482/the_pearl_by_john_steinbeck_theme_essay.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64b5b8ef7301f8b35b94f/t/5fc80ff929238313ad6657b7/1606946810158/baby_shark_lyrics_backwards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77463aa-f292-4df7-a8ec-be548a10ce44/wizard101_bear_s_claw_of_storm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c371c5d3-9bde-4737-996b-d66fd948c6b8/wilmington_city_schools_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8f2315-9967-448c-b7d3-632a317948d2/ridefutifilugefuzavema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37262973-1039-41d4-a5a3-dc9bff94279f/99462333190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/056de14d-489a-4734-b6c5-2b4873265efc/34387353620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e47bc6-a144-496c-b276-14ff53b73e3c/fewejeraxajiletepufuvis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc783e939503a47f6fdd85a/t/5fcb5b92a3bc3d19152d1e9f/1607162771082/design_my_room_online_free_games.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_off0000cf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF36 5780 bytes
SHA-256: 27b8676803f3a532841abed66e185b6498a8f148eed55f522b46225950dde68e
font_01_sfnt_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 11740 bytes
SHA-256: 875d2dcc4af3e84aca660c48cafbb76b4592a93eb4d4b8322ea81dea4e395557

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