Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dce8b4a8721b4f…

MALICIOUS

PDF

73.2 KB Created: 2021-02-23 19:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a1131cc9061906b980a5dabb556bd2cd SHA-1: bd21b5924b491c78305c965271dcc09bf9340ab6 SHA-256: 63dce8b4a8721b4f892482c316ce93b030cf7feaac811b4df3994488a6b82b36
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan. The presence of this URL suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

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://jacksth.ru/wix?keyword=toggle+headset+2+apk+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5fdf131a67399.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/dhgGQsT/10113880688.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/jjidz4b/77402103932.pdfIn PDF document text
    • http://bekasopeli.22web.org/say_something_lyrics_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5ff7cc0bb6472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_60205a296ddcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5ff29491f30a8.pdfIn PDF document text
    • http://tanifulumu.iblogger.org/1229010512.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/SsiaWOM/86128562714.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/9RUDtLY/goxuzavefug.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/41515955491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_5fe436a96f278.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_600492a2f2474.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/gehfjgu/91715313647.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/jotizifime/hieroglyphics_cartouche_template.pdfIn PDF document text
    • http://vowaderisosalel.epizy.com/10_zip_rar_archiver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/assassin_s_creed_3_apk_obb.pdfIn PDF document text
    • http://biduxefu.rf.gd/befikebitobavufaja.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_off0000d075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD075 5900 bytes
SHA-256: ba0542c2efd3b1fa345ca4b64d4e5d6706e6b621015eef76222cc0248cb4dc0c
font_01_sfnt_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 16156 bytes
SHA-256: 735f9b4bde671b1b102e42081e8e1ff142ed1ac38e6ffc71cfed248dc67d09cf

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