Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4d6cc8167e3c72…

MALICIOUS

PDF

67.6 KB Created: 2020-12-07 07:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 40b593c164956d1629b3080757e9a21b SHA-1: bbee34563a4b1c12d38723bb68e2be3a15ef84b8 SHA-256: 7e4d6cc8167e3c72c3f6ad4010ac10d3db457481269891ae136fc743cd2772bf
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded content, though heavily obfuscated, suggests a lure related to Android games. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/aws?utm_term=best+fps+android+games+offline In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48f3145a8629dca706a5/1606371572223/fiverr_conversion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8fbabc3-d458-4849-b2ff-ea7c25d446fa/figaxitol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc297918139af03764ff7e8/t/5fcd8ff7920f47545bad6513/1607307255852/steam_railway_magazine_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/brushless_dc_motor_theory_of_operation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1012fe5c7695ca99c31f6/t/5fc33cc9fa04221c7188fef3/1606630602368/work_energy_and_power_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/61421102916.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1fa8793968640865e0/t/5fc387963485235c8634409a/1606649750678/kateme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d5544d-f602-4780-95a2-babec69f1f81/nukebarulesaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9dd0426-c7b5-4641-80e8-e0f09d4ab921/dr_cindy_trimm_commanding_your_morning_prayer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1f1639c4363e29269e08/1606229782939/94074482635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0802b3-21ca-4d01-a22c-984fb0cca289/99090938339.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0055e5687f52b6b7c450a/t/5fcd8845d235d37878de03c1/1607305289291/virtual_assistant_jobs_las_vegas.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_off0000ccd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD5 5408 bytes
SHA-256: 404a386d37b8338ba2266fde9896e4bc8ee27b91da573153cb2339d3c399f05f
font_01_sfnt_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 10296 bytes
SHA-256: 8c10b4e1f06bedebb387153b76b01de9ed484b26e2805a6846082fe298419ad3

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