Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4f351426d0eddf…

MALICIOUS

PDF

72.2 KB Created: 2021-03-01 20:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e119dec7369b82e6b6298bb9c09b6b40 SHA-1: 77e438827cc12e2aead7416dd0afcd04c8bd451a SHA-256: 9b4f351426d0eddf771a384e7e011178ebb1afc0463eb902a515e577ab0fb23b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of an external URI points to a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+ask+her+dad+for+her+hand+in+marriage PDF link annotation
    • http://wapadax.scienceontheweb.net/mijoteuse_crock_pot_smart_pot_instructions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478923/normal_5ffb404d9b183.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/an_occurrence_at_owl_creek_bridge_by_ambrose_bierce_1890.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/JrgiXAq/puppet_pals_harry_potter_wizard_swears.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suzogoga.epizy.com/ant_video_er_for_firefox_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/64028690014.pdfIn PDF document text
    • http://detosiko.rf.gd/new_movies_2018_punjabi.pdfIn PDF document text
    • http://lodonevubepivor.epizy.com/sogidotugedoxolapug.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/grimes_county_sheriff_s_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/21625206175.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/journal_of_interventional_cardiology_case_report.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/moliere_in_the_park_school_for_wives.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_off0000dee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE6 5408 bytes
SHA-256: a105f5829fdfcc6791497ee54c047367062a21eb502d3c8f7f1f9576bdc154c4
font_01_sfnt_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 10112 bytes
SHA-256: ad3b8f1f62f10dd17246fe6d5580ad7206bf17bd74f046cadcf6b6692a6b5dff

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