Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76773cc693c7580…

MALICIOUS

PDF

82.6 KB Created: 2021-04-06 10:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ff4841671ddfc6a423d59fbc26c3d056 SHA-1: 6ebf91bd8e90822a9a0c2c11f7f84ff926c0503f SHA-256: e76773cc693c758094f81ad6cb81c7e7f097daf45084b7600d2b73413a4a392f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The document body, though heavily obfuscated, suggests a lure related to the Queen's Royal Guards' pay. The embedded URL points to 'baarspo.ru', which is highly suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=how+much+do+the+queen%2527s+royal+guards+get+paid PDF link annotation
    • https://cdn.sqhk.co/fabadipub/R6hjpib/play_spanish_checkers_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482023/normal_605d9f0f6e753.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/TKfpHM7/40625889446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600d280d82921.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/vIFoXif/21532650521.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/hefifhg/among_us_emergency_meeting_button_sound.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/ihgjiis/universal_music_artists_app.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/jes8q9V/480495403.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/Ricjjhf/hill_climb_racing_pvp_mod_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vivugiwu/hhjaJsE/33174895022.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/amir_levine_rachel_heller_attached.pdfIn PDF document text
    • http://pezejij.mygamesonline.org/57540759789.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/8hggiu5/73967362457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_6018d35662855.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/G0ieibV/multi_stream_obs_plugin.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/b6abe0d1-a8da-460b-a6a2-63d067e8a47a/puxiwun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c373f3c3-8f74-46e8-9af1-3831cbe71331/wererat_5e_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff558ddc-a4da-4da1-b4f9-6b9b44a5012e/apology_socrates_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf03678-9283-488f-85a8-71e8b45c32b9/at_dev_english_to_bengali_dictionary_free_download.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/74380364091.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_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 5684 bytes
SHA-256: bd1f5a4e0000dadf546b7f76c4e3f0b0665503888dbe45abb65b2eeaacec0ff1
font_01_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 10896 bytes
SHA-256: 22c1d714bea8f91c2b952c8c754345e6ea040da9f7e8026f33b5d563a597cafb
font_02_sfnt_off00012ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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