Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4dbeb332f61a646…

MALICIOUS

PDF

85.7 KB Created: 2021-05-28 14:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 47bd793f94912ea001211a2275c7a302 SHA-1: e00decd733adb2f78ea261d189860dd565564a0f SHA-256: a4dbeb332f61a646a3536b3261c0ef750a18131e59a6d6e05abaa3428b87ee63
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the nature of the embedded URL suggest it is designed to trick the user into navigating to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ponafet.ru/strik?utm_term=can+ayurveda+cure+spondylosis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476939/normal_6022a0a57e8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_601556239efcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369643/normal_5fe1d5db78d6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479674/normal_6039700b3c628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5ffadf912cc5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449178/normal_6004002d8ae3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490121/normal_6035f985cafaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464083/normal_6002ecb1b5ee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fd2eeebb3801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_600e79ea79cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_605501037a206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445119/normal_605c71f424e9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5fe3623cabdbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_5fd68b5c88f6a.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/91592998-b88a-4910-9728-ce0758d08251/57591634089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0455b43c-5162-4380-87b4-4fdf3f4784bb/sopagodeliramizupopepop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ba4452-5f82-4549-a16c-acd63168dd29/singer_futura_embroidery_machine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7516c347-4ba9-4540-9522-c22ecb669d61/largo_al_factotum_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c52abb-f9df-410f-b21f-be6d8ff56186/onn_bluetooth_earbuds_charge_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf37960f-4b90-4913-9bc6-22e907374633/eneloop_charger_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616dfcc0-ebfd-4dc0-ab18-1fe8aa772bb0/gokidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef34371-2300-47ab-80a8-6bd3e2db84aa/sinogeputinifumitetusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19440ddb-a79d-44b1-afb2-20087f01bf0f/skyrim_how_to_improve_smithing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b15852-573c-4b20-9a59-d9613451664b/la_riqueza_y_la_pobreza_de_las_naciones_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065de180-0b73-4afe-8087-52734eb18f1f/plant_tropisms_color_by_number_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8cb767-84eb-41fb-8a86-daa1d8371825/which_gift_of_the_holy_spirit_is_most_important.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_off00011210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 5136 bytes
SHA-256: 1ee8432666d090053617af05de50d9a33792b24f3abe850ed3693ac929e1d18c
font_01_sfnt_off000123a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A1 11016 bytes
SHA-256: 00bc5907f33c50f52f023bbfed2b0d0c7e03e0dc92b1c8b31b5854699c51b5ed