Malicious PDF — malware analysis report

Static analysis result for SHA-256 575417720859f832…

MALICIOUS

PDF

70.8 KB Created: 2021-02-21 16:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a3c5cebf03508942f9c1aeb517fde5b9 SHA-1: 2f1769369e6c40768643d3edef6571d7095652f3 SHA-256: 575417720859f832beb8064c86be62552c8db7b6d2a7388fa47f6fe0e9f81dfd
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://baarspo.ru/123?utm_term=how+to+rebuild+omc+cobra+outdrive', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a technical topic, which is a common lure. No scripts were extracted, but the presence of external URLs and the overall malicious verdict strongly suggest an attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=how+to+rebuild+omc+cobra+outdrive PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450864/normal_5fcf18c2ee93b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460980/normal_6006e7eb62859.pdfIn PDF document text
    • http://stickerrus.ru/general_chemical_structure_of_olive_oil854ix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_5fc6aab9d04a8.pdfIn PDF document text
    • http://jopkapopka.online/477077834992bfic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_602f1a82b15a6.pdfIn PDF document text
    • http://www19216801.site/59614879201d78qn.pdfIn PDF document text
    • http://mini-cam1.club/9003144797v2xr5.pdfIn PDF document text
    • http://marketop.club/92100432560u75pw.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/lizevabedezituleyjl6m.pdfIn PDF document text
    • http://walkover.me/chitika_meeda_chitika_vesara_naa_songdh4xb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_60171f72f26d8.pdfIn PDF document text
    • http://merishwheelrecords.com/dfl_pretest_answersalhmu.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/kibavutibeved/73246084645.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/mariah_carey_best_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/lavava.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/25223732955.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/zulomosadaluve.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/dragon_city_breeding_sanctuary_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/2010_dodge_charger_sxt_performance_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/albuterol_neb_davis.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_off0000ca67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA67 4936 bytes
SHA-256: e7e3ec8ea4c1e6b9f8e2e4d429826d9bb1be6700dc3fa12c7a5a3d52c986ae13
font_01_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 10716 bytes
SHA-256: 60f0840be373424a144431a5ae1126eb8ba944e82618d3af25b967d3db977740
font_02_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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