Malicious PDF — malware analysis report

Static analysis result for SHA-256 019afbafddfa87c8…

MALICIOUS

PDF

78.1 KB Created: 2021-05-30 19:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f7a2299f03f30d5d9463ff5eda12b614 SHA-1: 3f3e4763227271571757188a3e30d812d6a1d6a5 SHA-256: 019afbafddfa87c841adfb1134c236e5eaaf57cd99434e139cc0f492a203ebe8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, disguised as a programming tutorial. This indicates a phishing attempt to lure users to a malicious site. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=netbeans+java+programming+tutorial+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451760/normal_601e002bbf5ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_606c44aa6e2aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_60126d3665962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446394/normal_60030ad550fc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5febfb4598145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_60150d7da1e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_60164f73130ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467318/normal_5ffac08fd1e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_602af22d06faa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5fc5afadc2d33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe52ee56ec9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5fe80cda4977a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/75298aa0-2872-430c-a830-0c4efc9995ad/kijusevixageberefevusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7731a3b7-172b-4f20-a513-6fe2ad80cbd9/biwidomegumiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9570f977-4583-42c5-8a83-d83cd6f8e8ef/wawinabezilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0bb2d0-a07e-49f5-84e0-1170b77e3f04/craftsman_generators_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3903f00d-8c8f-4d71-95b3-a5a628276d62/10366850140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a93a15-bcf1-4ca5-a14f-65f8b885fe73/nexefix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a39c602-4d4d-4f85-bede-c366512e537a/tosagabuvagegivokam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ac6817-7231-4375-9635-b891012980f7/james_patterson_new_releases_december_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc5e09e-ad6b-441f-af12-71f130e3cd15/ruvamob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b64a56-1247-4d12-8e9b-2bd52cb6acae/college_essay_writing_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7d3565-fc22-4a50-bfb2-05b814eabb14/ante_la_tumba_de_un_maestro_poesia_completa.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_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 5608 bytes
SHA-256: ebcbe9ec2326365ade5d5c0b5a9c8a9575baf25ba2f78161ec6f7ea2baf2aa02
font_01_sfnt_off00010430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10430 11484 bytes
SHA-256: f3803372da1d42540cd2024a0c5311d2083f049789caa8ba93aed218169f5c61

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