Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ec40dff17e8dd3…

MALICIOUS

PDF

79.0 KB Created: 2020-12-10 23:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d6d408cfd4220973b513f0c23f2b261e SHA-1: e9d1275c06dd13e7ecc12bc539aa15517f300e23 SHA-256: d3ec40dff17e8dd35c379eced40d2cbb6e3e1e927c9d3059cad3f9d029f3e56f
96 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 lure related to public domain sheet music, directing the user to a suspicious URL. ClamAV and ML classifiers strongly indicate maliciousness, consistent with phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for further exploitation.

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://trafffe.ru/aws?utm_term=public+domain+free+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f996705efe0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5f937f4eb06c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457857/normal_5fbbcff6d090d.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/xiwevitox/romedigefegulir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d732fc9c-3784-421b-92b4-18f520fe3b0d/hawks_homework_level_c_unit_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56729c44-6ba6-44d6-9dbe-53a201c930ae/47187317894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb84da9-08cb-4486-b00e-af1e3da087a6/negezopefatujajid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9797fa6c-1879-4ed8-aca8-7818f14a7eb4/6837083560.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/private_facebook_videos_2019_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea13c45-dbf1-42b5-be5f-38d4928e9caf/caracteristicas_y_funcion_de_la_mesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4e3e92-988f-4d46-9905-63d2e8877028/95397110127.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65808403f5353fdbaadc9/t/5fcc6dd58a55f2188b6f786a/1607232981188/movojedetubufisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f4bcca-c1cf-4d78-a4de-9e9dc1cfbde5/xuruxedemekemin.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_off0000e2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E3 5404 bytes
SHA-256: bbf1bc0f67c0870d82d4d528dd1a8227d3f56f23e9416b160b9aa6a7b0ef4dbe
font_01_sfnt_off0000f511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF511 10808 bytes
SHA-256: b2b62aa84b4ae5e4fefe45fdc3d00788c8916d479f283580f00631965e475deb
font_02_sfnt_off000119f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F3 16100 bytes
SHA-256: b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4

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