Malicious PDF — malware analysis report

Static analysis result for SHA-256 57765ae32ae3d103…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 22:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6da3b7548dd18ca738f81c3d76d2047f SHA-1: 9401816e23dfa79a0f04f233192964b3759a4b92 SHA-256: 57765ae32ae3d1036b8016148dfb84993d1d4efa3789249c4ff51c9d3610b002
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a meme and a tool used for PDF generation, likely as a lure.

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://maypoin.ru/wix?keyword=mfs+meaning+meme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383913/normal_6041887e485eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476446/normal_5feb9bf1bf2b1.pdfIn PDF document text
    • http://kemutedetabu.scienceontheweb.net/60110222528.pdfIn PDF document text
    • http://rikaseligexodiz.22web.org/67774940804.pdfIn PDF document text
    • http://boguzimaro.getenjoyment.net/rinime.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/iBp4ggp/animal_crossing_pocket_camp_descargar_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415081/normal_6004719960bab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5fc9dbb21f3bc.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/74185858573.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/73667729371.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401732/normal_6007a7f9d631c.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/atlassian_bamboo_documentation.pdfIn PDF document text
    • https://cdn.sqhk.co/tojemapimibo/ji4ny05/dictionary_of_shorthand.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_600cf3ffc2ffc.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/91668871439.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/bifkF55/31131606591.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinixebun.epizy.com/fluval_406_filter_setup.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/sex_and_the_city_2_cast_names.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_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 4964 bytes
SHA-256: 63b83689d4b0e033ca39dd9574ab64451949ea35efa316c29f91f4a1ecf11bba
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 10476 bytes
SHA-256: 03f584d08579913aebe1434f1ca6611478e5a80e8c48098e97a8558c25d53609

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