Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56688c3bd4ee6ba…

MALICIOUS

PDF

72.9 KB Created: 2021-05-01 05:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 26875a0048dcd625c8ae7a7afd604d97 SHA-1: d191e3ca0f9cf3bc5742e17700c2e3303826fb76 SHA-256: c56688c3bd4ee6ba174b867f292fb0c98d5766954e6a904cb276d27df780d6ad
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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=o+how+he+loves+you+and+me+piano+chords PDF link annotation
    • https://cdn.sqhk.co/tudosiki/havLXJG/bein_sport_hd_apk_v2._3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_6019109577c26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421218/normal_5fe541e5b8d66.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/jd3Rcr7/fotirinijufoveba.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/smvjjic/conspiracy_of_silence_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_602a44c5cfe42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5fcdeb5984bde.pdfIn PDF document text
    • http://dutexesagoviri.22web.org/17102531326.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/ggjdifN/warriors_vs_raptors_game_6_schedule_philippine_time.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/Ajgheja/war_dragons_marav_spells.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419413/normal_6030504700d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489850/normal_5fe92c7d32ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_6044215ab0040.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://uploads.strikinglycdn.com/files/bc89baa6-78a5-4730-a972-55d00a971dda/97314574316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1282869a-32b8-4a72-9c9e-59f67f867011/mejor_universidad_de_bogota_en_psicologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e62f32-5141-49fa-8b85-f6e0c4526901/17503025849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39003471-7271-45b7-a6f5-4cadbd76deb9/how_do_i_program_my_rc73_remote_to_my_directv_box.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/west_bend_hi-rise_bread_maker_41300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bced99f-cf15-4c85-b3cb-31003592edc4/do_all_asus_routers_support_aimesh.pdfIn PDF document text
    • http://joxupabazifo.rf.gd/24589523329.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/does_apple_magic_mouse_2_have_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/gakapajanutepugokovin.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/cfm56-_7b_engine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/explain_the_principles_of_ecotourism.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_off0000d300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD300 5396 bytes
SHA-256: bd5f5502985b064035e212d66b4ecbf8fc734b9cc4e5ec56e27cb2c0c9a9fb9f
font_01_sfnt_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 10064 bytes
SHA-256: 741473fd7c25f60a51d4b2a6a47af696b2bcf8348373bbf595964d4fb6bbeb9f
font_02_sfnt_off000107c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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