Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b94f55dc4da8dfe…

MALICIOUS

PDF

77.2 KB Created: 2021-03-25 05:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1465d8f0ab08f0db858ab21d710e9dae SHA-1: 6de1666c94181a1dd64a081a22a2025985f99666 SHA-256: 3b94f55dc4da8dfe4dc8283835f3028d75de0f2eefe3276c887427d56a8fa968
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 pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to the URL's keyword, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=corridors+of+time+piano+pdf
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5fea3c66a24b2.pdf
    • http://xoziduso.mypressonline.com/3620827671.pdf
    • https://cdn-cms.f-static.net/uploads/4417818/normal_60484e290c59a.pdf
    • https://cdn-cms.f-static.net/uploads/4369632/normal_6014d7f16da8a.pdf
    • http://bomaduworofa.medianewsonline.com/adding_decimals_notes.pdf
    • http://gubuxuk.scienceontheweb.net/30435095375.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/voxazedisula/vatixajutugareva.pdf
    • https://s3.amazonaws.com/faxaxos/60886764299.pdf
    • https://s3.amazonaws.com/gozifep/how_to_convert_latex_to.pdf
    • https://uploads.strikinglycdn.com/files/4469a35b-f021-44e5-adaa-6228511791ae/toastmaster_bread_and_butter_maker_model_1185_manual.pdf
    • http://sulenovigadi.myartsonline.com/amit_m_agarwal_differential_calculus_download.pdf
    • https://s3.amazonaws.com/kewakuko/the_shining_remake_movie.pdf
    • https://uploads.strikinglycdn.com/files/bfd409b2-9cf8-4320-8539-46f93ee95426/65569960010.pdf
    • https://uploads.strikinglycdn.com/files/bbe7a673-474a-4387-80ba-47b381c2a326/fundamental_theorem_of_calculus_part_2_calculator.pdf
    • https://s3.amazonaws.com/pasutiz/how_to_make_probability_distribution_on_minitab.pdf
    • https://uploads.strikinglycdn.com/files/e5f4dfc7-4473-4492-836e-bd9f287591f6/how_to_use_a_hair_diffuser_properly.pdf
    • https://s3.amazonaws.com/jakujakula/careers_in_medicine.pdf
    • https://uploads.strikinglycdn.com/files/240dc87d-7235-49d7-8ef5-615966238232/strongs_concordance_number_214.pdf
    • https://uploads.strikinglycdn.com/files/4a654f2c-3c07-4bb6-9f9a-18a26f3373c6/59270127749.pdf
    • https://s3.amazonaws.com/ligole/how_to_reset_legacy_850_garage_door.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c7.bin
bf9718584c3689e3044fccde98d6cb869a99c05a16ec39e82feb06bed66f85d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 4964 bytes
font_01_sfnt_off0000f38a.bin
c9616c295f8955845e4a618b8f8da5d89557a81c6c6b76aa8622c913ee2f88eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF38A 11068 bytes
font_02_sfnt_off00011998.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 4324 bytes

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