Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf74252f95b9e9b1…

MALICIOUS

PDF

67.5 KB Created: 2020-11-19 02:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a5342cf8164bda5bdb0feb7d8a93230d SHA-1: 162daeb99703401c36499ef383bc959e030e0e7c SHA-256: bf74252f95b9e9b1cf772d622c9d89aac5cded4340b10d8c2271da1339cb6ccd
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://traffine.ru/123?utm_term=pi+in+excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fa247721dd53.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/2232add0-b0f7-409e-be38-edc3ff248065/what_words_that_start_with_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fa800f-2db4-4563-b57d-62bce363da7d/xolarejelogob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411d07fe-245e-4154-b375-5451818a8ae0/elementary_differential_equations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7a4872-d2d7-4a1e-9ecb-be578b932609/32901209707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37b4a97-4139-47b0-95c3-cd7819f495b8/7595666309.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/govodonowal.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/39651703038.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/3d_max_portable_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b5633b-745b-47c0-b47a-dc84df7742fa/probability_and_statistical_inference.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/centralisation_and_decentralisation_of_information_system.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/kapaxusubidulevofurorujew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852a9cd4-6ff4-4aea-af9d-9884fdbd66d8/30904446995.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_off0000ce47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE47 4376 bytes
SHA-256: 01775ccabe90279beafada063f93d3568daba28b637ec76115752aeb72456157
font_01_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 10824 bytes
SHA-256: cc41f6de6a17622770540355a3583c551cf9705160b3c0028f42e5336e98a657