Malicious PDF — malware analysis report

Static analysis result for SHA-256 624508a513c542af…

MALICIOUS

PDF

81.6 KB Created: 2021-04-23 20:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a57530364cb681413ede8ebb575c2719 SHA-1: 78729087fd232215cbad3fd399e7290d9f74034b SHA-256: 624508a513c542af9af1597b6b7e0c9fdbe311973ae4bc277468e2b014187314
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'seumenha.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to a malicious site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=tr%25E1%25BA%25A7n+%25C4%2591%25E1%25BB%25A9c+th%25E1%25BA%25A3o+nh%25E1%25BB%25AFng+l%25E1%25BB%259Di+tr%25C4%2583ng+tr%25E1%25BB%2591i+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449783/normal_5fe80c696b0d2.pdfIn PDF document text
    • https://cdn.sqhk.co/tuforalogidu/jgciTHd/kisal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491670/normal_600895357214f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_60556f1bb854e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_601337c1c258d.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/k7Mhiic/luboxen.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/VR4t1Js/among_us_free_to_play_on_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/8R5HihR/vemigasexid.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/e146c5f5-3b2e-4379-bd71-1c5299b44ae0/how_old_does_a_dachshund_have_to_be_to_breed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809a43de-8099-4d3f-9766-3afcbe8bdec5/how_to_find_the_slope_without_points.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/gimimefipux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793c34d8-cbb9-45c6-ba0b-8dc3910176bb/59758139806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b16938-02c2-4db8-9a11-69ba6016af86/camp_x_ray_full_movie_123movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e57b81-c2f5-43fd-900c-09c21ee2ec5c/vutumivawaz.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/waec_biometric_data_capture_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3249d600-3778-411c-8c34-4a0518b3b4df/movujafotovubiwulijekekob.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/achyutam_keshavam_krishna_damodaram_free_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/64143176961.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/apc_backup_es_700_ups_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd08e46a-73c2-46ae-8a89-805ad08f0c72/toro_timecutter_ss5000_front_tire_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c787c7-38f7-40c9-8d85-a25b46fb09ae/80547909388.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/game_fancy_pants_adventure_world_4.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/43095641263.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_off0000edd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 6652 bytes
SHA-256: caee8d5954e750fa9785085ef40afe5b5d3417df2f35811e66cae751e4b9db4b
font_01_sfnt_off00010265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 23684 bytes
SHA-256: 6b2a9d46285f1444730291da0ec23e58bc3cb56ee1397e1c1c3fd84c3f0d176e

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