Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a75fb3a74330330…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 08:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d2adb680ca33a4dfd890cc66d2d76be SHA-1: 5561571d8078f20b95e4eaa8711f778a27ac4205 SHA-256: 0a75fb3a74330330aff54461e59fc92a4d89af18ced6d7ebe5dff75907d2251f
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://xezojetit.ru/award?keyword=vehicle+safety+checklist+pdf', suggesting a phishing or malware distribution attempt. The PDF structure and embedded content are indicative of a malicious document, likely delivered via spearphishing.

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://xezojetit.ru/award?keyword=vehicle+safety+checklist+pdf
    • https://static.s123-cdn-static.com/uploads/4403676/normal_60081e20ec833.pdf
    • https://cdn-cms.f-static.net/uploads/4407331/normal_604413473d85d.pdf
    • https://cdn-cms.f-static.net/uploads/4450347/normal_601c8cc871609.pdf
    • http://kanshoper.site/rock_climbing_training_manualxj2cs.pdf
    • https://cdn-cms.f-static.net/uploads/4425784/normal_604f9797adaf3.pdf
    • http://rosutob.getenjoyment.net/94341041675.pdf
    • http://sigisuzuk.getenjoyment.net/types_of_public_relations_research.pdf
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/kitegaduxenivolo.pdf
    • http://fishland.store/7699504090z6ofx.pdf
    • http://kyukty68.xyz/mozagubatugatijofeza5sil.pdf
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/2333521.pdf
    • https://cdn-cms.f-static.net/uploads/4383699/normal_601094003d3d7.pdf
    • https://linekepev.weebly.com/uploads/1/3/4/0/134041162/8140429.pdf
    • https://pifodepap.weebly.com/uploads/1/3/4/2/134235937/nebelemepegar_wuleboxidunowob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_9c1b58c1ef4b49f0b44db801f4e5dea9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4d5a18ae-fcab-4be9-bdc8-a76413e4eeef/xorikefuvuka.pdf
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_c869b32d720c4a0e8af28b0ae1409453.pdf?index=true
    • https://uploads.strikinglycdn.com/files/babc50e0-4a96-4926-98b4-8ddaa5cf78e4/3919279687.pdf
    • https://uploads.strikinglycdn.com/files/9bd0c4e8-bca9-4f75-9c13-e158efef6773/zivunumixoborelosat.pdf
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_cb97a511ce104bba9da286477a8e6312.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4be.bin
0b13c5b9303f921cfe0e3edf7d4e79bf94fb7fcb47eed9790a8faa1031307121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 4852 bytes
font_01_sfnt_off00010556.bin
0ebf1bf36a11379273d518cdd7c7d7554ef81c675bf5734e79968a58d69d8c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 10760 bytes
font_02_sfnt_off000129e9.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E9 4324 bytes

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