Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b974a52168e8da…

MALICIOUS

PDF

85.4 KB Created: 2021-02-14 12:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ef2eb634f97c89f89d59c9e5989b6c70 SHA-1: 796e7d1bc42c0cfeccafd503bbdb9c6b3572fbb3 SHA-256: b3b974a52168e8da31debfa7eaf7e4df7eaebea9d179520c2f26f176da2203ee
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 pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to reference a singing contest, likely a lure to entice users to click the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=concurso+de+canto+en+inglaterra+2015 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ff4dda38620e.pdfIn PDF document text
    • https://dijamolilum.weebly.com/uploads/1/3/5/3/135347404/pazuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5fff770a4688c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_6011ed594e15c.pdfIn PDF document text
    • https://zuvaxufar.weebly.com/uploads/1/3/5/9/135993026/zateroxew-ziteredetuwut-worerijuvekusi-vigasowuvemavur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375705/normal_5fec1b75e9f45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385853/normal_5fc82cff90d30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5fd68bf9b944f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426699/normal_5fd13270aa4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_600b3edb35028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_60160cbe6d72d.pdfIn PDF document text
    • https://kazubuxupopa.weebly.com/uploads/1/3/2/6/132696048/sirilizizurat.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/sajatofubote/herpetiform_oral_ulcers.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/cbr_bike_race_video.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/dropshipping_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/vosuzosidimabumakobe.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/spotify_premium_kndigen_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/14605393254.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_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 5464 bytes
SHA-256: e8efff874890b6dc608460c29aca35cb5690b11e7e25ae5e4c9a03e5b7caf359
font_01_sfnt_off00011f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F47 12056 bytes
SHA-256: 0a71da32c27469313c19f73d81e6dba41d9e853dc9ad8ef7a5d44e0c7c600ddd

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