Malicious PDF — malware analysis report

Static analysis result for SHA-256 8285877c5578dce4…

MALICIOUS

PDF

71.4 KB Created: 2021-03-14 08:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 071fae11544d2da5f4f0402880a7b470 SHA-1: 45578b4c1d2088bd4f8f6e429021bf710ffdf147 SHA-256: 8285877c5578dce47d13c5db8451ecbb218c0d8f6383432a6d0a4cb7087a28d9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'mezovuduw.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Gumball movie review'. No scripts were extracted, but the presence of malicious URLs and the overall detection profile strongly indicate a phishing or malware delivery attempt.

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://mezovuduw.ru/wix?keyword=gumball+movie+review
    • http://wegansit.space/210782604513x8if.pdf
    • http://ruwaxidalemib.iblogger.org/application_android_l_g.pdf
    • http://ruwulazitu.iblogger.org/international_standard_email_address_format.pdf
    • http://hook-up.fun/jetefopesuminil1sui6.pdf
    • http://fortuneo.biz/fijogesejusitidakegutokttdp.pdf
    • http://svoylend.xyz/english_job_interview_questions_answers8r5h2.pdf
    • http://mastericy-chistoty.ru/buziwuwiginisufapudagidabr5y48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ddaa6b51-5e36-47f4-9419-029a474bace9/33867505836.pdf
    • https://uploads.strikinglycdn.com/files/2fd124e8-8c91-4c6b-b2b0-4a5de005d60e/fundamentos_de_marketing_digital_google_activate_respuestas_modulo_3.pdf
    • https://s3.amazonaws.com/xetasif/antonyms_worksheet_for_grade_11.pdf
    • https://uploads.strikinglycdn.com/files/975149e9-4538-43c7-9f2d-db3eda47ebe6/manual_de_supervivencia_de_ned.pdf
    • https://uploads.strikinglycdn.com/files/69c3ffaa-f45b-4d97-bdf3-41f4d0737799/gowutuxemunid.pdf
    • https://uploads.strikinglycdn.com/files/e6daddf1-e849-417d-a2b0-aa6b0c21ee2a/boss_gt_1000_core_price.pdf
    • https://s3.amazonaws.com/dotivaf/95763334581.pdf
    • https://s3.amazonaws.com/gajabedafot/serijeneru.pdf
    • https://uploads.strikinglycdn.com/files/0aab7283-d425-44ef-ad55-148aa0dcc7e2/velupuxabagoz.pdf
    • https://uploads.strikinglycdn.com/files/0054b82f-f86a-4b8c-ac25-2cac5bbdfb8c/70780737274.pdf
    • https://uploads.strikinglycdn.com/files/b1e7ec3b-d5f1-4fab-81be-387332e0b27f/1286677381.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd2.bin
37acb3c1bcccaf8c79abc47b2112dccaca1ae4bb9d0deef78a62c9e489b8be77
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 4976 bytes
font_01_sfnt_off0000edbd.bin
b72b4682e06ba1e75ce8f59592949990519bb6de639089eb823b39a9cad0297b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 10388 bytes