Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23db36f09cb3762…

MALICIOUS

PDF

81.5 KB Created: 2021-01-06 01:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 334e4fa93af1c2b5bdf6d20980062572 SHA-1: 542962555d2060d840dced978830dc040ccf27c9 SHA-256: a23db36f09cb37620ca4b9822bd40bbd8085b06cd86c109e936e566e1ad7c951
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 0.9997

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://traffine.ru/aws?utm_term=forma+corecta+de+plural+a+cuvantului+chibrit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5fdbc3f5b7420.pdfIn PDF document text
    • https://savipamezixu.weebly.com/uploads/1/3/4/6/134673646/4782266.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/hhFichb/jekuduw.pdfIn PDF document text
    • https://cdn.sqhk.co/nogedapuvul/igiig9I/9th_class_computer_science_book_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5fe5ee34ca7e3.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/lorifumofelu/blockchain_technology_in_supply_chain_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3b1414-973f-4bfe-9f12-e832b1f96310/22935366685.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/56236788468.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/google_com_chromecast_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/991904738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe2a8a8-acef-4800-b57f-9440db4d2316/technical_communication_today_5th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/67885574726.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/gta_vice_city_free_pc_apunkagames.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 5292 bytes
SHA-256: 7fce294fb42fb71bd8d6d65c8b78781d5190d64387e13ae0b37cc1e578663804
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 12796 bytes
SHA-256: 47275b0d0cff6bebee46d352d192e8dd80e98b758d842383ffb2e8107416c0f8
font_02_sfnt_off000121ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AC 16132 bytes
SHA-256: 6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028

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