Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c7bce167fa05f5…

MALICIOUS

PDF

75.2 KB Created: 2021-02-28 10:32:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bcb0dc95c6d38f0f2b569a581fcf2ec0 SHA-1: 7bdd60fd8933d29e465a71b0e074403827be77e9 SHA-256: 90c7bce167fa05f5120976dce8133b0bc1b22ebbc278de2df332f2c05ac18d4e
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, identified by the PDF_URI heuristic. This URL, https://dugedepap.ru/award?keyword=what+does+it+mean+if+a+horse+is+broke, is likely part of a phishing attempt to lure users to a malicious site. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing trojan.

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://dugedepap.ru/award?keyword=what+does+it+mean+if+a+horse+is+broke PDF link annotation
    • http://doctora.club/27463806243mw6ld.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/629305.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370051/normal_5fc62d797a153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_602df854afe9e.pdfIn PDF document text
    • https://movalolutipala.weebly.com/uploads/1/3/2/6/132681002/1735000.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/wamogijasunuwosin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5fe1240a2cbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_6033244626f68.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/xugekobemelumedopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5ff0ca8ac11dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5ffe43206bf4f.pdfIn PDF document text
    • http://byt-upak.ru/48968892678npsyy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fd98b94b055d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_5fcfb140e33e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445129/normal_60256ebe1d40d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wufajin.rf.gd/autosketch_9_free.pdfIn PDF document text
    • http://fawivemepogu.epizy.com/62720917126.pdfIn PDF document text
    • http://nipipaxala.rf.gd/18227333658.pdfIn PDF document text
    • http://pisotusapuveg.epizy.com/calories_in_taco_bell_beef_soft_taco_supreme.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_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 5332 bytes
SHA-256: 4389ecd4c9f4a54de3e672c45bee32e9837024ee941dcf597b9ffed27405aaa7
font_01_sfnt_off0000fcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDA 10188 bytes
SHA-256: ee1507364acde99f1d9f5bdfe55efb110cc5b18063b974bd9c7c6af461520f0e

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