Malicious PDF — malware analysis report

Static analysis result for SHA-256 737b47f980f1dda1…

MALICIOUS

PDF

71.5 KB Created: 2021-02-09 11:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7266f9798c32992a15f16df20fbaca73 SHA-1: 3b33475a89c9cecef4656450dcae7bc2a6dc56c3 SHA-256: 737b47f980f1dda1cc3ac5bebb85233b22e63444c7172c3612f660ceeb92653b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to lead users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/123?utm_term=upright+scissor+lift+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423454/normal_6007fa4659fad.pdfIn PDF document text
    • http://electriccannoz.club/jegowaxufititizidaxufen42phd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_600d505f534f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_602241d31ce6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451025/normal_5fe0fdb0a0f5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fee7d5c22214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383804/normal_5ff63ae7b79e5.pdfIn PDF document text
    • http://iglivesupportteam.com/36026188409x1x2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_601f138e76fb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_5fe635dab39df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_601c96a3c7038.pdfIn PDF document text
    • http://reduslim-buy.site/53345164243rqh79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454281/normal_5ffbad8739f1d.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/dekot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fetufebutegiv.rf.gd/calendar_planner_template_word.pdfIn PDF document text
    • http://sinofemuda.rf.gd/zepon.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_off0000dc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC09 5420 bytes
SHA-256: a673ea6dba0d758bef3b9c0edcad02a40e9f60948a4b38b849c68d9d97a103ed
font_01_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 10228 bytes
SHA-256: 667c79a87bd83bf5cf8bc437b0b3c318f61b67cc9f45e586fc37c38febe07822

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