Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ae8d873d1fe6d3…

MALICIOUS

PDF

77.6 KB Created: 2021-02-21 03:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91f736ed05d033e3ea4015f558e8416f SHA-1: 4c38271ff313d81eca0d765c5b759bf1a287f3a8 SHA-256: 27ae8d873d1fe6d359328a0022bda331e7b208c5e43fcb04e95dadc86586f0db
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically the one pointing to 'bologen.ru', suggests an attempt to redirect the user to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware distribution tactics.

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://bologen.ru/123?utm_term=what+is+a+good+book+for+couples+to+read+together PDF link annotation
    • http://smartradiobf.ru/sizukiwisejatexesnxf42.pdfIn PDF document text
    • http://ourfutures.space/paroles_le_temps_des_cerisesrnzjh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5fcff348e04f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489028/normal_6031abc593aa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_601b39efb18e4.pdfIn PDF document text
    • http://bluetea.space/vozuwifilogutigukixijisu3wnh8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444630/normal_5ffc0529026e1.pdfIn PDF document text
    • http://muzoc.xyz/wezetomadetonuganuff7oaj.pdfIn PDF document text
    • http://lovechat24.club/22156304618rtp1b.pdfIn PDF document text
    • http://supfitket.buzz/day_of_spring_stardewf8db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_60261d43f3aaa.pdfIn PDF document text
    • http://bitcoins-profits.com/harvest_market_sienna_trolleyezq5x.pdfIn PDF document text
    • http://mgacessoria.online/whatsapp_plus_apk_ultima_version_descargaroj6yx.pdfIn PDF document text
    • http://autocredit.moscow/zewagovapisetek8yjm4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gezizefefififa/riwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/avast_pro_antivirus_full_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/61873192949.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/71523116843.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/catecismo_infantil_westminster.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 5412 bytes
SHA-256: 0086dd8637c5cda2509f645b19cd88d8835f9ea62151524a20bd32d0f538a849
font_01_sfnt_off0000f741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF741 10408 bytes
SHA-256: f7b614d7e9ea6ce92590ad0f98d6cacc7ab4453d2a8a5b252d9f9c2064d53437
font_02_sfnt_off00011ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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