Malicious PDF — malware analysis report

Static analysis result for SHA-256 f123f43adebf4c49…

MALICIOUS

PDF

333.6 KB Created: 2021-03-22 18:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a1d7bc4316f10aa56c889de9ca4626c SHA-1: 5449cbdeae817c7f0f640903047e93c261a6178d SHA-256: f123f43adebf4c497a736e79e8ad98c1b05ff9aeab95adeeb8b5ba9d6aa4a569
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://midufefew.ru/award?keyword=chinese+characters+meaning+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375344/normal_6009f06d56358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5fe2f6105c34a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5ff2f6a0bd816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_603c3be885b97.pdfIn PDF document text
    • https://lisewaduw.weebly.com/uploads/1/3/4/3/134358893/bagebilavijeto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_603c4a9b2fc65.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/f44790cfc54d8f.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/780r2hj/3314991756.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/wWCqYid/brutal_street_2_mod_apk_unlimited_gems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_6035a41dccd90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409255/normal_5fcc1a214ac46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460231/normal_5ff9c058cf9aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5ff475e9a8e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_602080657a08d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_604b8135c11f6.pdfIn PDF document text
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/4272b3a11b327.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/duhhSgi/75218696506.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/wazorixekunafob/what_intermolecular_force_is_the_strongest_in_ch3oh.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/remove_articles_chrome_android.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000291c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x291C0 194648 bytes
SHA-256: 4776efd012cd04bc23ad7dcfcf19d9ea3dd9b70b85e9232ebcc1699df7150b1b
font_01_sfnt_off0004ca19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA19 5440 bytes
SHA-256: 32e0fb72c21e884a826dda026801b543a4647cc328040b79c3c1d1c9e1b992e9
font_02_sfnt_off0004dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC70 18224 bytes
SHA-256: 24f2e0d19f1c2bb25452e642b52d8a9d31ddd5fd1bbe1bc9af64790e21cce3e4
font_03_sfnt_off000510b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510B9 16116 bytes
SHA-256: ba9b5293d46f42e597c092e757bf770b0226661663f119891d806c1875324a0c

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