Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67e7b8c04482080…

MALICIOUS

PDF

73.0 KB Created: 2021-01-16 17:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bac40160e3a17586c3514fb3b1fa14ec SHA-1: 7664c2aedf7e869ee8a2f5f6b468fa2cc8e62b16 SHA-256: e67e7b8c044820800f782f0e9e860996cf59b06390c940642cbec6e6a9add6a6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text referencing 'Rot and ruin webtoon', suggesting a lure to attract user interaction with the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=rot+and+ruin+webtoon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fbda14a05fdd.pdfIn PDF document text
    • https://site-1225538.mozfiles.com/files/1225538/bass_pro_shop_springfield_missouri_address.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388406/normal_600204dd39282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f8c18e430cce.pdfIn PDF document text
    • https://site-1246529.mozfiles.com/files/1246529/abaxis_hm5c_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f88ae9b67f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450884/normal_5fbd9daa2cfa6.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/taturi/pisujozexanifujepoji.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/barellan_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/39914758516.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/wutajesako.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/10342525040.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/blessed_assurance_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/bafaguwazisotosuloxi.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_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 4848 bytes
SHA-256: 0b6fcb5a758e58de7bad67f32e7dd0b13c89ae09736585762bb803dffe9b3aa0
font_01_sfnt_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 10584 bytes
SHA-256: 31b498c5dc4e542de257d5393c10c5628e90f5f9e62f3a2d5f7ff12af0bf87fb

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