Malicious PDF — malware analysis report

Static analysis result for SHA-256 95356ed99178f442…

MALICIOUS

PDF

74.5 KB Created: 2021-02-07 18:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bdd9fbf39f22c58e72b1e7e08f88ad74 SHA-1: 4667a9fc987e82ede1f940a0c37f1b194e0d44fb SHA-256: 95356ed99178f442ce02ec8f755bb4f285aab98e6d979814bb92240bf187e7cc
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan distribution. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick users into installing malicious software by masquerading as a necessary browser update or extension. The presence of numerous external links, including one to 'seumenha.ru', suggests a potential distribution or redirection mechanism for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://seumenha.ru/wb?keyword=uc%20browser%20%20for%20pc%20setup PDF link annotation
    • https://cdn.sqhk.co/mugolino/hjjbJjg/highway_patrol_tv_show_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/tLJidgi/nimeruninemedudifare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495994/normal_5fdb2cdd8265d.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxigu/tIghijd/67192690969.pdfIn PDF document text
    • https://sulezesolujoseg.weebly.com/uploads/1/3/1/4/131452841/dfed5db2ccf912.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/9850941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/analyse_de_biologie_mdicale.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/java_netbeans_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/80497814653.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/exponents_review_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/javascript_ajax_form_data.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/94697989284.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/44379888766.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/59153867926.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/multiple_sclerosis_treatment_guidelines_australia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6A 4720 bytes
SHA-256: 54d3823f0f232c9d752988c9deac7a828eded846cc01fe41a74c7b99cc67a339
font_01_sfnt_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 10456 bytes
SHA-256: 67edd94aabc2228373d804a8bf6a2222cfd025147dd67ff44842bebcdb91c521
font_02_sfnt_off00010f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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