Malicious PDF — malware analysis report

Static analysis result for SHA-256 f437c9521edbce49…

MALICIOUS

PDF

85.5 KB Created: 2021-03-01 00:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 89451c047077ea0b2d7c6fe7f0432ac5 SHA-1: fb081cebeb1bc7a9b885e407165c327a05373f5c SHA-256: f437c9521edbce498fa4098c88f0a618820c54ce8a4d3c3d5eeea00581c431ab
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate maliciousness. The presence of an external URI suggests the document is intended to redirect the user to a malicious site, likely for phishing or to download further payloads. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://golowaki.ru/wix?keyword=amino+acid+chart+codon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445103/normal_60254ae516a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_6019c3e959932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_6035d7cc2a5fa.pdfIn PDF document text
    • http://kmplitka.shop/30326244217x7g36.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/traxxas_t_maxx_2.5_transmission_parts.pdfIn PDF document text
    • http://svarka-aurora.online/block_diagram_algebraxig4o.pdfIn PDF document text
    • http://accface.in/152536864846r2g1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_601b00225fbbc.pdfIn PDF document text
    • http://icub.tech/eia_weekly_report_schedulemxtop.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/71702642304.pdfIn PDF document text
    • http://summ-ita.space/does_walmart_do_vaccinesyohyd.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/gurafoga/91866757663.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/dinner_invitation_email_template.pdfIn PDF document text
    • http://dodarululi.epizy.com/finudipij.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/36754421327.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/buy_california_king_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/moon_druid_5e_guide.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_off00010782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10782 4960 bytes
SHA-256: e378f3c66d26fe0e173499bef9dbf8f570e4fbd99b18ec45ef585e51ca81a4a6
font_01_sfnt_off00011830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11830 15888 bytes
SHA-256: 56b4c5547572fa6f1fa06c98dd454755c8be20e50aa69ba115e81f7e8639562c

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