Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7be9f654db36efe…

MALICIOUS

PDF

74.9 KB Created: 2021-03-10 01:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3ac855c233b0bcc4b4f35fc70caab8f1 SHA-1: d0c8b28d0382c45293fe9df88210d799532c851f SHA-256: d7be9f654db36efe8f5f94913c27fe4ac8b2aae7779ab5bf2e8ae2d79feea9a0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used for phishing or to serve a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a harmful resource.

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://jottigo.ru/award?keyword=programming+in+ansi+c+4e+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469378/normal_5fcd883b73ad6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420761/normal_5fee690be4514.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/JVhaLia/ludo_star_2_apk_mod_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464314/normal_602fad9d01de2.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/z5gfjVP/islanders_score_live.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/UidMj5b/interesting_food_facts_2020_olympics.pdfIn PDF document text
    • https://cdn.sqhk.co/zimofuzam/igjw2Fi/wimusiwamizajugimidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_600b79ee7cd79.pdfIn PDF document text
    • http://info-pages.ru/6055510916vwy43.pdfIn PDF document text
    • http://apparently-home.com/ms_driver_license_status3gicm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449781/normal_5fe49822d7e3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_6044780752e4e.pdfIn PDF document text
    • http://exemplpusj.com/antecedent_form_meaning_in_telugu6oa2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366040/normal_5fcbd6a95a72d.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/tutasujal/matlab_programming_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/magudumelabakuj.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/40455927663.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/62006719538.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/gulufuzutu.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/60535309967.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/9697983490.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_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 5532 bytes
SHA-256: 2e74cf0ee3019dea24e5ddb8d136fa8349b2acf5a747c8a74d6fd677327eb7e5
font_01_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 11168 bytes
SHA-256: 08b0c18867eaf3eb73a35d0ab044401a4af859e1019ab69d86f6fab3cd44719f

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