Malicious PDF — malware analysis report

Static analysis result for SHA-256 7497ab783001cf42…

MALICIOUS

PDF

75.1 KB Created: 2021-02-18 11:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 10abe9403d65a42dd8be5c05a18a0dcf SHA-1: 0860249de41ad44ea1db1afd3395707abad63698 SHA-256: 7497ab783001cf429e70e65dc20d8018407f55d63e170a3c205906f1a3d70481
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'https://baarspo.ru/strik?utm_term=mistborn+book+1+characters', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://baarspo.ru/strik?utm_term=mistborn+book+1+characters PDF link annotation
    • https://cdn.sqhk.co/vabolepibe/objj2p8/jawokad.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/gjhih5L/bike_riding_on_the_west_side_highway.pdfIn PDF document text
    • http://muxonobugimaki.22web.org/systematic_theology_wayne.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/XjdkOCA/27942543817.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/fKOgeP3/32097155390.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/logd1PY/mens_haircuts_2_on_sides_fade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimunofat.epizy.com/sam_monaco_informatique_service.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/blur_background_images_hd_1080p_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/xobutatut.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/nifowifakuzog.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/injury_report_colts_vs_steelers.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/zubuxiwozatusunudawesub.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/pajajelobipijasa.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_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 5116 bytes
SHA-256: aaddb2b28f984306d04d8e5b66fc9b80467cf7694f9a4de3571af0a0cd9cd44e
font_01_sfnt_off0000fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 10352 bytes
SHA-256: c4fc9fa342ed9a6b7aa87c601dbac22ac6ef84b948a70f92d36d61a2c020f5ea

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