Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8baeb5e60114e4c…

MALICIOUS

PDF

79.5 KB Created: 2020-12-31 18:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0dbd8cfa2bb34d00905d642b91dd5d0c SHA-1: d4717c9b0d5bbb5869bde589202ff0400dbdb265 SHA-256: b8baeb5e60114e4c467ca75fe339170fd416cd9dda8d51137d0e1c5267c09ca5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body contains text that appears to be a lure related to 'Lee jun ho instagram'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://traffnew.ru/123?utm_term=lee+jun+ho+instagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5fd6815cb3d0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497666/normal_5feb0207782d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462708/normal_5fd5f0d185f42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5fc37f7e41405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485012/normal_5fe14ef5544e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413696/normal_5fdd37c09b1e9.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/domegagowevag/2016_honda_cr_v_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/star_wars_aftermath_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/pilujiw.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/98882883533.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 5084 bytes
SHA-256: a2ab64df24b2cd0983390d11d42e496779090d5476d6c86fced9c1f15aabc92c
font_01_sfnt_off0000e7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 3812 bytes
SHA-256: 67dd25d78e7d727b1a211070f3192da8d8ce082bf01f25a0e18d9e30a00c23d5
font_02_sfnt_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 10308 bytes
SHA-256: fc8233a6a400f7d7b88b6d9c18bb3e4e77c05f100f3b663e3a649aed134af971
font_03_sfnt_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 16620 bytes
SHA-256: 103ef0b9c7108bbe2553c697088ec24d17eea182ac906964fecaf78d10f4b1f6