Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cc3d8efdd2b488…

MALICIOUS

PDF

69.1 KB Created: 2021-02-11 07:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 64a0ee6951576f77df4e3b31f700e9f1 SHA-1: 75a634345c7a80b7ddba443170ac2b540ce10cd7 SHA-256: 82cc3d8efdd2b488a62212b131aff6b3517fd30cfefa77238a97d79517010bdc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/123?utm_term=free+fallin+live+john+mayer+tab'. This URL is presented in a way that suggests it is a search result for song lyrics, likely to trick the user into clicking. The ML classifier and ClamAV also strongly indicate maliciousness. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=free+fallin+live+john+mayer+tab In PDF document text
    • http://glasshookahcatering.com/khanna_paper_mills_ltd_annual_reportthbdg.pdfIn PDF document text
    • http://50off.pro/farewell_card_template_vectorzju3t.pdfIn PDF document text
    • http://alcexpress3.xyz/facebook_page_manager_apk360lm.pdfIn PDF document text
    • http://return-0.com/exercises_of_1st_2nd_and_3rd_conditional3vgqh.pdfIn PDF document text
    • http://torgservis-rus.ru/zusopexuwalurorifivipudowcwg4.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/asiaone_app_for_androidrbbch.pdfIn PDF document text
    • http://giocodigital.website/imperialismo_europeovtujj.pdfIn PDF document text
    • http://betmoy56.com/289604715010mpk6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377935/normal_5fdf6c2b5b519.pdfIn PDF document text
    • http://dommasters.site/defibtech_ddu-100_service_manualu1szx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5fe3a66c64b9f.pdfIn PDF document text
    • http://natlab.ru/le_chemisier_bastien_vives616sj.pdfIn PDF document text
    • http://pl50off.info/98820965889kauvs.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/gurupixabogivaz/redasakif.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/example_of_damage_report_in_ship.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/razuzujox.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/dosiruwa.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/topawibotoromuge.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/best_live_wallpapers_for_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/dutosadofetupaxaw.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_off0000cea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA2 5164 bytes
SHA-256: 9540210aed639885ae30444a0ec690be1e443624726f0342a06323f3d5b16485
font_01_sfnt_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 11724 bytes
SHA-256: 0cb416a3c9ce680714b2ffe909e71ad350c8b829105efcde465b7db17f0637ff

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