Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f5e655c02b2c4d…

MALICIOUS

PDF

73.3 KB Created: 2021-02-28 18:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f124e345185ba526e094e593ce340657 SHA-1: 1382a2250b78e7053cb1f6eec855d3adc5a820d6 SHA-256: d1f5e655c02b2c4d2e6079e8c4668fd7599b100a7e3b50ff1fa26e557c69700f
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious domains, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Minecraft music download'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or deliver a payload via the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=minecraft+music+download+unblocked In PDF document text
    • http://prequester.online/downhill_mountain_bike_frames_for_sale_philippinesr99e0.pdfIn PDF document text
    • http://pravagims.net/physics_dictionary4f840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496810/normal_6032f6cdcf969.pdfIn PDF document text
    • http://idealica-ufficiale.site/veda_mantras_telugu_freexwx2q.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/aha_guidelines_for_bls_2017.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/how_to_use_scarce_resources.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/wamagiwuvigimofajadu.pdfIn PDF document text
    • http://tiwikif.22web.org/2014_jeep_grand_cherokee_transmission_maintenance_schedule.pdfIn PDF document text
    • http://legiontry.online/naxiduwamopufedimetemo3ig1.pdfIn PDF document text
    • http://twoup-viktoria.online/weather_forecast_for_october_in_los_angeless7beg.pdfIn PDF document text
    • http://dusosax.66ghz.com/rockwell_compactlogix_selection_guide.pdfIn PDF document text
    • http://raisinshub.pro/bums_syllabus_2017o7rs5.pdfIn PDF document text
    • http://websporizle3.com/rivirumolafetakekuviddrktu.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/fall_guys_wallpapers_4kqj2no.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jupafikita.rf.gd/coursera_cryptography_week_3_quiz_answers.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/hp_2013_ultraslim_docking_station_2_displayport.pdfIn PDF document text
    • http://vetuvawefaxuta.rf.gd/99399986017.pdfIn PDF document text
    • http://zamoguwudegovo.rf.gd/malaria_fever_blood_test_report.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/gowegoximevedutujisa.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_off0000e4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D0 5468 bytes
SHA-256: c74bc4a4fd35c042f1b2eeb2b5e831d2901859db67b43c03344e7553eec4bb45
font_01_sfnt_off0000f76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76D 9560 bytes
SHA-256: 6dd57ed463f5135f70c6b0faaab5c1cf264b8c9b0d7951c529fd7284ce6b36d3

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