Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc8b1dabb96e74e…

MALICIOUS

PDF

273.1 KB Created: 2021-03-20 12:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a86b77ec18dd4b6cc72bac7caf4ad027 SHA-1: 57a5ba215d7cb921cebfa9a4200ee3616e9ae0c4 SHA-256: 4fc8b1dabb96e74efa18c4adebadc3fc783ddffc4b1dc5d75a147cef3e2ddd57
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. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, 'https://resalured.ru/award?keyword=the+papyrus+of+ani+pdf', is likely used to deliver a malicious payload or redirect the user to a phishing site. No scripts were extracted, but the PDF structure and embedded URI are sufficient indicators of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://resalured.ru/award?keyword=the+papyrus+of+ani+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482619/normal_5fcd5e82dede4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488582/normal_5ff34b09b4c9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410416/normal_5ffb2e48aadbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387433/normal_5fc5b8b5a7325.pdfIn PDF document text
    • https://xegezutiraviral.weebly.com/uploads/1/3/0/7/130775125/pobonavojofa-varagadofulo-pufesazem-magesigera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389793/normal_5fcaca7d90486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454047/normal_604dcd74ac6ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_601d2b7d91eed.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/3f808e9bb058ac.pdfIn PDF document text
    • https://kidogotetivi.weebly.com/uploads/1/3/4/3/134375399/9621720.pdfIn PDF document text
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/8779641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384160/normal_60466d23c5759.pdfIn PDF document text
    • http://bemixenorekuji.22web.org/spelling_exercises_with_answers.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/726213122.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_54bb722f11dd4660ad05636ea5dc3a3d.pdf?index=trueIn PDF document text
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_7579007938a14d76b305fdb86724f1a5.pdf?index=trueIn PDF document text
    • http://letituxis.epizy.com/gunafijerimuguzobeban.pdfIn PDF document text
    • http://nelevevupa.rf.gd/font_vivaldi_picsay_pro.pdfIn PDF document text
    • http://lugopupi.rf.gd/cannapower_musik_kostenlos.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/nuvivoji.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_off0003ffc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FFC0 5148 bytes
SHA-256: 22950a9936b36e372dd3992123c144731606b5c427ab377f3f9b3f25eae33d82
font_01_sfnt_off00041143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41143 10784 bytes
SHA-256: 7c032c881fe382e009a22fec68c2aa0d4955f98666b43a908684503997e6ed38

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