Malicious PDF — malware analysis report

Static analysis result for SHA-256 875ac68b3e46bab1…

MALICIOUS

PDF

65.3 KB Created: 2021-02-06 22:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aee4a3ff373bc7c7671c302b9e7e7ac1 SHA-1: fe0eb0da6ff6d97810f51fb347aa887ed6ddb376 SHA-256: 875ac68b3e46bab1bb2bdc155192225bc98c249fef816cf98a69a99139ca3578
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://druttle.ru/wb?keyword=bass%20boosted%20music%20remix', which is presented as a music remix. This suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://druttle.ru/wb?keyword=bass%20boosted%20music%20remix PDF link annotation
    • https://cdn.sqhk.co/kasavakujosi/gjRhasx/deziwakeruruniwodobuke.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/jbgjerD/mugimevozaguwu.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/46jdesr/96629938466.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/c5gchao/luzelemosile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_60080acd94222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5ff95dd0edb3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379384/normal_5fe2c00c914ed.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/Rfhc7gj/nerododokimid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390641/normal_5feebfd6b73da.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/mokuwanibof/98059541271.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/jubijusemubirekevoruxen.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/voxox_free_calling_app.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/9108049548.pdfIn PDF document text
    • http://luwikomoxure.epizy.com/zomob.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/egyptian_bed_sheets_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/jimokujapopowifesadepuvux.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_off0000c10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10A 5312 bytes
SHA-256: 72404a2ebaecc633a3f63f2a81d5cfbe2d72934bb0c66e804ad980730517e22e
font_01_sfnt_off0000d302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD302 11340 bytes
SHA-256: ec39e12b90b00f80694f6191cc792fd06c45ded2c3fdad6ac07dab2595ea0f8e

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