Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74c081a31442c4c…

MALICIOUS

PDF

69.5 KB Created: 2020-11-23 23:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f58b8c3a0ba8b545ec8eb7525a6e53ca SHA-1: 1feb740675c50b2cdb86e6c384737270c3a4de73 SHA-256: a74c081a31442c4c1c2737691fe56fccf5d0d22d3080fb2d23c8593502dcc78b
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=letra+a+mayuscula+y+minuscula+para+colorear PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f94c41e4b846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453575/normal_5fa64393672cf.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/03991db5-7e23-4d73-93b3-548db05b23bb/a_god_in_ruins_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/business_letter_writing_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cab260f-c850-414a-9863-7b510ed22ab5/bizamajag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be00f2ff-bed7-4b57-9f3e-484cef3d1a2a/rinozekapuran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cc9eab-fe2a-43d1-94fe-6edfc94b8016/suits_s01e02_cda.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/garmin_nuvi_265wt_map_updates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc00f04-ac44-4120-a036-caa2794e9bed/aki-_sora_yume_no_naka.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/18526812569.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/grimoire_for_the_green_witch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d2b9d4-3972-4ac9-963d-0c0a30f772d0/chefs_choice_609_premium_electric_meat_slicer.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_off0000d165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD165 5124 bytes
SHA-256: 6af8b9bdf4fc9a61f1e61caf5f146f7f6b49d6f9f25bc9212524f1c2fca848c2
font_01_sfnt_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 11292 bytes
SHA-256: e87588646ac7bd839d46cb0e079e217ac9fdd706c0fd03db7a83f808ca30872a