Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1b06d76190a454…

MALICIOUS

PDF

83.5 KB Created: 2021-03-22 20:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deeef9998f69efda27ebb9e1b6f04afe SHA-1: edf0b88aa217c9e9e684dedaea26e4f6074935e5 SHA-256: 3c1b06d76190a454e72a156673b6c3ce5375b874fabcd64ee728f0fd904c7f38
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 exploit users by directing them to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/award?keyword=arquitectura+sostenible+en+el+peru+pdf
    • https://cdn.sqhk.co/lukuvekeliki/hfIjcLl/matrixyl_10_the_ordinary.pdf
    • https://cdn-cms.f-static.net/uploads/4369919/normal_60272e2b1243e.pdf
    • https://cdn.sqhk.co/lazuxorus/QifjdN8/angle_meter_pro_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5feb389c21f2d.pdf
    • http://setokanekema.mygamesonline.org/54516219014.pdf
    • http://wubujonil.getenjoyment.net/26914115611.pdf
    • https://cdn.sqhk.co/rawavuzom/4haDTRQ/54246195119.pdf
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdf
    • https://cdn-cms.f-static.net/uploads/4407818/normal_6049d26fc1f26.pdf
    • http://zuvatewovu.scienceontheweb.net/7475342423.pdf
    • http://musomojil.mywebcommunity.org/67213533900.pdf
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fd3d92955bc7.pdf
    • https://static.s123-cdn-static.com/uploads/4450139/normal_5fdf1f182a256.pdf
    • https://cdn.sqhk.co/bobavijiwoba/7jbBibG/galaxy_moto_rider_2_mod_apk.pdf
    • http://ruwufuwetoj.mygamesonline.org/fokanepixugopepif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e0aa1aed-c0b0-4a18-a685-ff81a70d5ff6/what_are_the_tips_for_improving_listening_skills.pdf
    • https://uploads.strikinglycdn.com/files/3ffc0878-91a6-4683-bc96-4ecbfcd2d444/44751949324.pdf
    • https://uploads.strikinglycdn.com/files/7e08c96e-fb3b-4bea-b167-75180034dc4d/76631756363.pdf
    • https://uploads.strikinglycdn.com/files/339eb9ca-93d4-4380-8bd0-6cea56976792/graco_milestone_all-in-one_car_seat_gotham_amazon.pdf
    • https://uploads.strikinglycdn.com/files/d287d347-702d-4230-90cd-42b22c9f8e5d/honeywell_vista_20p_programming_manual.pdf
    • https://uploads.strikinglycdn.com/files/bcc2ba01-bc72-487d-92f3-1af8944b24d6/korean_grammar_in_use_basic.pdf
    • http://refusunono.onlinewebshop.net/gugovewolebewinomovusuv.pdf
    • https://uploads.strikinglycdn.com/files/37bc9b51-dfea-4cbf-8527-81beb5f60d22/how_do_you_write_a_phd_statement_of_purpose.pdf
    • https://uploads.strikinglycdn.com/files/b3bd6573-1f00-451e-8443-825a0c1bce2e/twilight_all_parts_hindi_dubbed_free_download.pdf
    • https://uploads.strikinglycdn.com/files/5903daef-8f2b-4895-a0ec-17b3a8a5bd81/3687942226.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ca.bin
b08b5fd4ec0e75e14762abcc56d49877243fb72f79a45e45e2b23abde3e73984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 5404 bytes
font_01_sfnt_off0001172d.bin
b427bc50144be0bb0b0f8fee036062892bfda4731e72f8b98f7cf0c81793f000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1172D 12308 bytes

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