Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b8d78a11f379dd…

MALICIOUS

PDF

63.3 KB Created: 2020-11-19 12:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 33d450afd07076644507e2cc1115101f SHA-1: 2488ef507c9a176fe05d6ac526313b17e5df50d2 SHA-256: c6b8d78a11f379dd3f43aab2b5e78374b7637380ff0b8a1824a0abcfa4d58fc1
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 0.9998

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://traffnew.ru/123?utm_term=fish+classification+lab+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f96812435995.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://uploads.strikinglycdn.com/files/3c9e5215-1ea9-4805-acb6-19d0c34f83c0/sorigewebujofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6176f137-83f9-4327-aea5-5a0bcb8360b3/bidudebesibiragesovafaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f94228-254f-4dda-9d68-e6108eef47b0/38747427618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675161f9-8477-4135-8cb2-5523094cad8a/noxapadorajipumagofupig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10439533-4a7e-4c16-854b-38285a0e8a50/tejisaxaruzugekido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa70960-f54e-41b7-a642-46e44d333c5a/43101312410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c927c905-6c7b-417e-b398-a5e3e1e14da1/palilon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5711a2bd-aecc-4b12-9b50-0d80bae8dc6e/56698775647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e995eee7-51f9-47c8-be52-395bf93e5c24/81792756338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f77fc25-1405-47ac-aad9-7eac9fc9b137/robert_edgerton_hasta_toplumlar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275a1523-9f90-44a1-8a8e-ce82540e0f13/finding_nemo_movie_download_tamilyog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de523309-800a-4f9f-ad0d-38a615db2efe/webelos_handbook_ebook.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_off0000af2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2B 5008 bytes
SHA-256: 9cb4a9dfc3ee5aa7bc8e0ec9c42aab6465b0753385bc4b12e8044862a83c573b
font_01_sfnt_off0000c02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC02C 10120 bytes
SHA-256: 7b5bb5fe27b4a11472bc11fe532f2c172e53cf8e2419bef116c7ae7c13c49935
font_02_sfnt_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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