Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8015026024a27d6…

MALICIOUS

PDF

45.2 KB Created: 2020-11-06 04:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1462b25d8f5cfb4201a217c4a0ca7957 SHA-1: 16a6305fc8e9fc010b7da1f4f3a9331154494bc6 SHA-256: d8015026024a27d680211fbd9080b0f63c97bfb051839dcfaad9258c8aca52a4
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The ML classifier and the 'Security Software Disable' heuristic strongly indicate malicious intent. The document contains an embedded URL, 'https://trafffi.ru/strik?keyword=slayer+leecher+keyword+list', which is likely used to download a secondary payload. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/strik?keyword=slayer+leecher+keyword+list PDF link annotation
    • https://latijivetazemor.weebly.com/uploads/1/3/0/7/130775002/2c7ed7280b2.pdfIn PDF document text
    • https://kilorokininoru.weebly.com/uploads/1/3/4/4/134470368/zijalize_golakodu_mokatutog_vobojugojepip.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/vomuginazox-firakinut-suvawe-wefomigas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_5f9e35a6d5738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f8c9364a6800.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/dejomuwuruw_gawivameloke.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/besafefaf/42654772644.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/37660789197.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/sbcglobal_email_settings_outlook_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/dukekifoxojulena.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/2016_ap_bio_frq_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/modeling_linear_relationships_worksheet.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_off000052e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E0 5388 bytes
SHA-256: 3855bccfc025cdb66681a98d69ee38f64b69a453af430dd232bd8d0ab9033949
font_01_sfnt_off00006541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6541 11400 bytes
SHA-256: 0343003a614861576827278c52e6f8cee2960cfd25640f99282087c77ad13d2a
font_02_sfnt_off00008c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C04 18148 bytes
SHA-256: ea79f2647530d72cd6842d2c88f79769f09b57ffc806d119633e090d0aef1b1b

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