Malicious PDF — malware analysis report

Static analysis result for SHA-256 3731c776ef2744a1…

MALICIOUS

PDF

60.1 KB Created: 2020-11-23 14:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b8904cfc7c3955fba277a597b6f08d1c SHA-1: d9e864f807bf070c20fa79411aa1b364e9edc500 SHA-256: 3731c776ef2744a1de02533922ec84cde9c1376677bc3090b06ddb858085d85a
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=manual+de+autocad+2016+gratis PDF link annotation
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5fa182b605c6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5fb4999d45ec7.pdfIn PDF document text
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/2651902d.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/655752.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/4589592.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/wonoti/frecuencia_cardiaca_normal.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/36854541818.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/didezasawifasoxap.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/grange_hall_elementary_school_supply_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140dcdab-5ff3-43f4-9594-639826cb0369/jugigujajupazo.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/words_that_start_with_you_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd68436-8b3c-4e46-a3de-208b4955e274/83859020911.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/kigobezoserakisumumes.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/wipofuwexowot.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_off0000ae63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE63 5592 bytes
SHA-256: 723f263e6e0672c0b88a35a0a28aafe826ae0efe76b1b131d7dd6b1a544b1e05
font_01_sfnt_off0000c189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC189 10016 bytes
SHA-256: 25f45c6a76b88767b6543a73f090f8a5acb0bb0e5c5dd39f9495475333bf4cd2