Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d76ef850bd9721…

MALICIOUS

PDF

125.3 KB Created: 2021-01-23 20:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4fdbd10796400c68e1c91be7f68d0cdf SHA-1: 66b2ab0569640bdade9932a63a6d34dcf5053f83 SHA-256: d7d76ef850bd9721d77c2665b03f0bafd464a05c2beddf3c38ec606d55d8f53f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic indicating it's a Pdf.Phishing.Trojan. An embedded URI points to a suspicious domain, suggesting a phishing or malware delivery attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://trafficel.ru/123?utm_term=calvin+and+hobbes+final+strip+ride PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374957/normal_5ff8b275aabab.pdfIn PDF document text
    • https://site-1245392.mozfiles.com/files/1245392/62586934906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_600bbd3c47782.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fc5ec7971bc0.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/kjbFjd2/28449517158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5fd31b36261aa.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/gfatGBL/blogspot_design_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469836/normal_6001ea1edb059.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/jhibMqr/first_time_pregnancy_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_5fd825cd8b9f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383165/normal_5ff1bb00c0c1b.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/hdnjbs6/kikaxebukufow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458852/normal_5ff19c95c4c0e.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/OjbngfS/highway_to_heaven_cast_season_1_episode_5.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/benubapopikaj/gujibuwavijujefafil.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/20936146252.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/kedetunajolejazakoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/memorandum_of_understanding_template_business_relationship.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_off0001ad21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD21 5232 bytes
SHA-256: 6e172427bd6ed8bcf9a0f4e3c8656319c1c14d0cf955f05aa41d44f01bf1d747
font_01_sfnt_off0001bee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEE2 12756 bytes
SHA-256: 397d74ebfd1beb7f3b92fc8f44372b0f10d57f07a91370e4b45b945273508dfc

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