Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b5749accef1d71…

MALICIOUS

PDF

69.8 KB Created: 2021-02-21 17:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4835aa5a9a89b9b22ad92871de67cb16 SHA-1: ea21be3ad68ee91d4b2af229420cc22a6e5e5608 SHA-256: f6b5749accef1d718ff81e91f1d42c97e360242004ce3d7e8ef0f7c75bc7813a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that masquerades as 'Vinyl wall decal application instructions'. This URL, along with other suspicious URLs found in the document, likely leads to a phishing page or a malware download. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF structure itself contains external URI references.

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://jottigo.ru/123?utm_term=vinyl+wall+decal+application+instructions PDF link annotation
    • http://zoomita.fun/code_ansi_protection_electrique4iujp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_5fe7ab4c920ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_6014c99693c8c.pdfIn PDF document text
    • http://new-leggins.site/37666744718c0e65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fcd623f47d4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_600a9dc706ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_60222216c83ff.pdfIn PDF document text
    • http://qwert-ita.fun/green_party_platform_summary5y677.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/tinezedu/you_must_answer_me_these_questions_three.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/guniguxigivebedife.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/yahoo_mail_free_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/64980535382.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/cessna_182_skylane_rc_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/athalia_modern_calligraphy_script_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/livuwalin.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/agents_of_shield_staffel_3_episodenguide.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/39151939942.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_off0000d444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD444 5224 bytes
SHA-256: a6cb7a2957ac715548136842553a3d39c5388ed520e220702667420479ee7ee7
font_01_sfnt_off0000e62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62F 10484 bytes
SHA-256: 2924a7f7b64cc208338d50d0282d558c35cce207b528249a832c5a925233be6e

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