Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fdc5dce5ef996a…

MALICIOUS

PDF

75.8 KB Created: 2021-01-04 00:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 673febf2fec90331b91acb57b29cef35 SHA-1: fb4322f0ac8a2b4d466d21cb7cd031c20c9323f0 SHA-256: 10fdc5dce5ef996aa864f5682cc61dd57b878f99e051db6f74e9f0cea544ca71
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a domain associated with software keygens, a common lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=xforce+keygen+autocad+2018+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f92dfe0e4efe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_5fea27d68bcb5.pdfIn PDF document text
    • https://cdn.sqhk.co/kojivitew/ajhAwmU/all_social_media_video_downloader_app.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/5e1eaa88-5d6c-44a3-a617-7836d4d3526b/khabib_vs_mcgregor_stream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4635d7-51e9-453e-889c-d118f2996676/free_ringtones_for_my_flip_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d3cc9c-de28-47a9-8cd8-56e136f20b4d/21112900745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6214f208-4c7e-4755-88b0-401549324404/45849679010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c98c52-e840-4e7f-a83f-fcf32957a7b2/descargar_test_dpc_4.0.5_apk_para_android_bibliotheken.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/basic_resignation_letter_template_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e0e0b8-c8d6-49a5-b9d8-754579b751e5/switch_pro_controller_bluetooth_lag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ff648c-b2d6-4629-ab03-ffa6265b889d/maternal_and_paternal_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d9a3f1-491d-4a92-a390-f440f1fd0b67/4750055079.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_off0000e81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81B 5912 bytes
SHA-256: 50e02c37a70bf6972346394667e1d65b14763b04cb241e1879bfeaa40b0f62b6
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 10524 bytes
SHA-256: e08ab85994daf9899c054803780cb6e1162a9c1d6c3c3d3602f1f60aa253f658

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