Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d134b0b0359239…

MALICIOUS

PDF

91.4 KB Created: 2021-03-22 14:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9326dfadb304456ccd893306e6b57ef5 SHA-1: 5ea6f148fc5b73d2f01319fc7e42d91f024603d7 SHA-256: f8d134b0b0359239b978355aaa1236e79718724a4c551f60139b0ecb5002076e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs to a suspicious URL, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to vehicle sales, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=2008+jeep+wrangler+x+for+sale+near+me
    • http://tokiridevifo.medianewsonline.com/91748979919.pdf
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5fd6abb59fe35.pdf
    • http://miwukewemiko.22web.org/46638577078.pdf
    • http://jepenufi.getenjoyment.net/45149065153.pdf
    • https://cdn-cms.f-static.net/uploads/4393754/normal_6028f41cd0fa3.pdf
    • http://vuvulusigi.scienceontheweb.net/bacterial_conjugation_transformation_and_transduction.pdf
    • http://tonilakifak.mypressonline.com/56428724161.pdf
    • http://rofogukiluvupu.mygamesonline.org/cutting_edge_intermediate_3rd_edition_workbook.pdf
    • http://kevakigev.medianewsonline.com/weber_grill_grates_cast_iron.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feferabi.atwebpages.com/baxi_luna_3_comfort_310_fi_error_codes.pdf
    • https://uploads.strikinglycdn.com/files/a5a7c77d-f09b-45d9-a515-9ad3a0e7bb9e/razamizarokasojov.pdf
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_e3190056d7fa44fe8cac1c940211bfd6.pdf?index=true
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_f3cc3f4e0aa1442b89610e206429102a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/44fe0255-0639-4d83-ab68-6ad107e5225f/luniberesipiborute.pdf
    • https://uploads.strikinglycdn.com/files/e0886deb-f91b-4fcb-b33b-04ee022197af/lolix.pdf
    • https://uploads.strikinglycdn.com/files/2d93b86e-5e55-42d9-bdbf-9389e66100ca/modelo_de_ensayo_argumentativo.pdf
    • http://tewederukafolez.rf.gd/arma_2_dayz_overpoch_mod.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_off00012364.bin
ac9a99bb461363279a85e1c06daad500841a338f0e7b557b3160e07de4be5919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 5828 bytes
font_01_sfnt_off0001374b.bin
29de10bc098714691e30453eac3995b6c7b78fe6f4596ea548843d6181a9b84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1374B 12020 bytes

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