Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a6159d5f870596…

MALICIOUS

PDF

136.5 KB Created: 2021-03-03 14:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02d3a88d81088c7efe2f8808806fe777 SHA-1: bd742b40408f86593727bdf130a31fb521fb34a6 SHA-256: 64a6159d5f8705966d0b26824a6d52acecade33cdd0ff0ca6ebe8c4de43e772a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://mezovuduw.ru/123?utm_term=estandares+y+expectativas+de+estudios+sociales+kinder', suggests the document is part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF_URI heuristic indicates the document attempts to leverage external resources, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/123?utm_term=estandares+y+expectativas+de+estudios+sociales+kinder PDF link annotation
    • https://cdn.sqhk.co/tesadubozino/dDWeknb/snapchat_streak_emoji_combinations.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/iiJjhhb/zezone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_60246963dc1b0.pdfIn PDF document text
    • https://cdn.sqhk.co/golizojuw/jajjhcs/free_download_winamp_mp3_player_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/pcrgjig/92472163341.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/Kiejdif/95104051779.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/PI4iUgc/65659047985.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/DBhighg/zitov.pdfIn PDF document text
    • http://helpcopyright-service.com/what_is_the_summary_of_ozymandiasqq4xm.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hggiifE/luzituxowataruruxunug.pdfIn PDF document text
    • http://dressnbuy.com/does_the_new_york_stock_market_open_todaydmcms.pdfIn PDF document text
    • http://wide-do.top/telecharger_pour_pc_windows_8bj8dz.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/enqhpF6/68818894752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474988/normal_60269832ce124.pdfIn PDF document text
    • https://cdn.sqhk.co/xawuboma/5jdsfgf/xabiviledanisexozofo.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/jaIQRih/5505383213.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/s2Hibhb/best_deals_on_apple_watch_series_5_40mm.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
    • http://zogosugo.onlinewebshop.net/30024970362.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/9279053589.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_off0001ca9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA9D 5200 bytes
SHA-256: 8de528cebd877f87a735629cf1b8fdc1f440d3f058630f2f810dcc1b708e7a0a
font_01_sfnt_off0001dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC5F 12336 bytes
SHA-256: 7a2a18a712f155553664dad7b304d46bb7ea9305b0a34442be8a92164b7efa3c
font_02_sfnt_off000203cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203CF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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