Malicious PDF — malware analysis report

Static analysis result for SHA-256 f871031730f4acfd…

MALICIOUS

PDF

72.9 KB Created: 2020-11-10 09:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ecda4b5863dffc5fb856b428eac59de2 SHA-1: 1f1e058c8ae1bf60f93025f4fbdf0efd431d49a7 SHA-256: f871031730f4acfd0080e715e88b02700b92cb1c487da2168d8b5b0e000078d3
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-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://traffnew.ru/123?keyword=moomoo+io+unblocked+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f88d1b14867d.pdfIn PDF document text
    • https://gafanotode.weebly.com/uploads/1/3/4/5/134576189/savaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8f2137d9703.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/992572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f884626a4ffe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/224777da-ac0f-4b63-8937-99dd044588dc/webofejejolabomamali.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/othellos_final_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/muscles_of_the_body_arm.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/jurnal_penelitian_penyakit_jantung_koroner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051690e8-db31-412d-8cf3-071b086401b7/7421918462.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/hollywood_reporter_magazine_cover.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_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 5372 bytes
SHA-256: fe26744ff266485b700ee60a9633bf91fc17e92b8089213d9a7779482c3f18ce
font_01_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 10808 bytes
SHA-256: ab694bc5126b410db99227f550ef37f22c90404181764f517797b098190e8888

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