Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e2891ee5f393ff…

MALICIOUS

PDF

74.7 KB Created: 2021-02-19 05:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 490ad1c4bc489a9d48e5b267b68e15e5 SHA-1: 46d26685a2d8fbbec773f937c5b934d5e61d49ae SHA-256: 37e2891ee5f393ff8bdb907cd1059bd6bd3ecabca927754d2d61818271b54dae
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to communication types, further supporting a phishing attack pattern.

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://jottigo.ru/123?utm_term=tipos+de+comunicacion+no+masiva+ejemplos PDF link annotation
    • http://texulateniz.iblogger.org/xoliribuwatigelajavavevuk.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/nS7giie/69352765925.pdfIn PDF document text
    • https://cdn.sqhk.co/zewapoxi/jYw51h7/febir.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/h2qhbj4/20868834992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443595/normal_5ff13e25f3b78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391015/normal_5fef9b713142f.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/dVhhL5Z/lobijomosetu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444117/normal_60095c0acfb43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409610/normal_5fd0521eeca6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_6016352f30b95.pdfIn PDF document text
    • http://fefebigaxef.iblogger.org/96769685248.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/vefagotoje/12._the_cognitive_perspective_of_psychology_focuses_on.pdfIn PDF document text
    • http://pagiwufuvefukuf.epizy.com/pujaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/free_english_worksheets_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/halloween_pumpkin_designs_template.pdfIn PDF document text
    • http://sagalesokalu.epizy.com/compound_words_worksheets_for_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/muzadabusilos.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/la_times_homicide_report_compton.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_off0000e432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE432 5208 bytes
SHA-256: b5dd1eb4b921580474dee3254ae2f8ece62828b6b2a663097182299069a977d1
font_01_sfnt_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 11572 bytes
SHA-256: a1eccfc56a426773ba423ef9db307808a43bc06d93683689d336dc364ae7a73a

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