Malicious PDF — malware analysis report

Static analysis result for SHA-256 d311547d0cd81e07…

MALICIOUS

PDF

61.5 KB Created: 2020-11-21 14:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7a79a7e9d11f9763de7423b8c2bdae88 SHA-1: d76f6b7d04c25893f7129b39ba0b5016d78949c2 SHA-256: d311547d0cd81e07c17c44c974094aefaeec8b608ded719f0d05936734c9b3bf
96 Risk Score

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 0.9996

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/123?utm_term=barbie+island+princess+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482426/normal_5faec82e39871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5f8e302cb7a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f8803cce336c.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/912f2d12-0b2e-4242-b466-92f3d3936c8c/the_essential_cosmic_perspective_8th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ed1c20-f0b5-4735-9039-8888ed2bf879/22547372021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb8b832-d2bc-4f23-a7fe-6754176f494b/73465698546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c12c1aa-8b6c-49be-8ef4-9e6e73e0b89d/population_distribution_definition_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362aa61a-cc1b-4c8c-a3f8-383f3c4cc77d/pakiwevikitubimox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05650f7-ec5d-431c-b8e7-00d5349a6d6d/sevetorakavalidojuxeren.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/wirabijikegaxeruv.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/90647475198.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/lekafedinowozopuduwom.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/south_korea_tourist_visa_application_form.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_off0000b0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F8 5548 bytes
SHA-256: 007d0ec7d89433d37de16a7d2d2a8bc7c878f8637afe0ca6b02a7140bc651e47
font_01_sfnt_off0000c3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C5 10992 bytes
SHA-256: 710aa5644c4893c7c49146142bf03097c81f2f4d205063341de53e98c0c6a51d