Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f9fe341f4fd055…

MALICIOUS

PDF

73.3 KB Created: 2021-02-26 15:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b10a2bbef336ce1003150dcfd7ba3265 SHA-1: ec2eba1d60f866408e73c34ae57686a48d01a611 SHA-256: 17f9fe341f4fd0555d8cb751b1f738ec189ebf34b43ca6ba7e16d8c8c42a6117
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Star wars books release dates' to entice users to click the malicious link.

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://nipisod.ru/123?utm_term=star+wars+books+release+dates PDF link annotation
    • https://cdn.sqhk.co/govazilose/epJVjiK/funny_king_tower_clash_royale.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/gjjiAQj/the_rules_of_survival_book_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/02iegh3/73222481743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468827/normal_5fc6429898362.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/ggtiEid/vuxedusenewujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_602899b50f9d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_6015a34357f23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366647/normal_5fcbcefde36fb.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/zizene/anonymous_questions_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/wazemipozoxek.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/donate_sheets_and_blankets_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/cry_on_my_shoulder_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/99811905726.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/annual_report_vodafone_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/swgemu_corellian_corvette_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/fatirojakejigub.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/14934373477.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/cadastral_information_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/kanijesukewidub.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_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 5220 bytes
SHA-256: fdaf931edfea2b2d0512c378f1d38efdd40db18f2f571196ec12263d5e631379
font_01_sfnt_off0000f53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 10140 bytes
SHA-256: f97ac9e159c1de9e118a2ae626c4319af77010c3e6e740a4ce442d2e40ca4171

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