Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5e36f9a4f2a8c9…

MALICIOUS

PDF

73.4 KB Created: 2021-02-22 14:36:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7b62e8b218efe1511e993327c5c01806 SHA-1: 4cded3cb33d7c233832ffe4d0f612da22dcc2e8f SHA-256: 0d5e36f9a4f2a8c902b88c5ee2db751b41cc7b0f26926c0be9c33b29240270d9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. It contains an embedded URL pointing to a domain that appears to be involved in distributing malicious content, disguised as educational material. The PDF structure and embedded content suggest an attempt to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=graphing+rational+expressions+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490735/normal_602c3e98a816a.pdfIn PDF document text
    • http://generatorsale.ru/the_pilgrims_progress_summary_in_hindighiu9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_602d1d707dbd0.pdfIn PDF document text
    • http://cashbackmoney.info/what_is_mpc_essentials_software5phz5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_5fe6f949b6c7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_60151cfeb68c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/56538451033.pdfIn PDF document text
    • http://riluromeni.epizy.com/hipaa_secure_now_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/22403264944.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/79981996087.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/39825068490.pdfIn PDF document text
    • http://rusozetowozo.epizy.com/masosotofe.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/pitozurobezopaguk.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/wheres_the_first_place_you_start_to_lose_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/safe_haven_baby_box_canada.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_off0000e16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 5336 bytes
SHA-256: ad25f2cd3fdf4118a8467e114d878cdc67031d40b1f6134b8e3df9b3b784c112
font_01_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 10700 bytes
SHA-256: 764cd358e42e0ac19ea978a28340b72b24bb0d8fbcd60ffd1569adda9bf771f3