Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda2baa6df87c744…

MALICIOUS

PDF

66.0 KB Created: 2021-02-23 11:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 171eb21b20c263eac6b090c1996f94e7 SHA-1: 281224adb84dc5c1a16103af949457b9f1c0dd68 SHA-256: eda2baa6df87c7442592e6097cf1c3c46ff60a23c2f85b4d36d0ecdd58adb756
136 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social engineering lure to trick users into installing a browser extension or update. The embedded URL points to a suspicious domain, likely serving as a download or redirection point for a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=ganamrutha+bodhini+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/xovepejegosi/bibihjb/rawuluwab.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/fiwesi.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/jjfjeQX/did_the_floor_is_lava_host_died.pdfIn PDF document text
    • http://health-top.ru/ytd_video_er_website_listtflny.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/jioihgh/58861403902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_601f633da299b.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/nuselufuzo/52305636666.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/pexopifokipe.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/d_decor_logo_vector_free.pdfIn PDF document text
    • http://luzadewo.epizy.com/83963391248.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/21377887745.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_off0000c68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68F 5368 bytes
SHA-256: 8ebc0c0b1cfcdfc195289d1b81f42f3278e9fb895ee901af446095d88ccc250b
font_01_sfnt_off0000d8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B4 10176 bytes
SHA-256: d70fdb4510bdef1e95272989b42e41628e7410dfa5f38fec58447425a7612cf1

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