Malicious PDF — malware analysis report

Static analysis result for SHA-256 8701d0dba5df7159…

MALICIOUS

PDF

77.0 KB Created: 2021-02-18 23:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6c38ca7a8ad454a33c326c53f900ebc1 SHA-1: 8f87f73b033213769f983771532a4f11d470bcfe SHA-256: 8701d0dba5df7159d31ee321a13e2883e78a7a6e61a78a25ec86f3a7fbdffe68
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'seumenha.ru', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, but the presence of the external URI heuristic strongly suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=ramona+forever+pdf PDF link annotation
    • http://tekufebuxu.iblogger.org/96488068044.pdfIn PDF document text
    • http://ravitidi.22web.org/mabevuxuwopilirebe.pdfIn PDF document text
    • http://lutefofojonu.iblogger.org/28477260530.pdfIn PDF document text
    • http://limaxinsto.xyz/eso_silks_of_the_sunpjfev.pdfIn PDF document text
    • http://nutristrike-shop.ru/673880789655eako.pdfIn PDF document text
    • http://importants.space/activate_windows_7_ultimate_freet4f8s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dudisij.epizy.com/how_to_calculate_p_value_from_f_statistic_in_r.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/xoxavubokukelesizuxe.pdfIn PDF document text
    • http://waminakukivexo.rf.gd/xasikisap.pdfIn PDF document text
    • http://maretazijedoval.epizy.com/rejuboz.pdfIn PDF document text
    • http://sogulonogob.epizy.com/sopimixuxadawu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/92111818141.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/guntersville_fishing_report_may_2019.pdfIn PDF document text
    • http://rumavajusugeg.rf.gd/achyutam_keshavam_song_in_female_voice.pdfIn PDF document text
    • http://fusuzuveraku.epizy.com/minority_report_trailer_music.pdfIn PDF document text
    • http://judomoposigu.rf.gd/8393815765.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/42615115332.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_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 5044 bytes
SHA-256: 40fe07ad19557f25be3550a5eb4699c21403b2e6fac61af007115f9db2e74d07
font_01_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 10492 bytes
SHA-256: 2799772de52e55ec7a820a91efcd41f0e24e9b4078d195439d36ec3d9b13d695

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