Malicious PDF — malware analysis report

Static analysis result for SHA-256 2967f8ed5c9ecb8b…

MALICIOUS

PDF

70.6 KB Created: 2021-04-04 01:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 352d0a8979c4d272fb81ccf967d5faa9 SHA-1: 53b8eeacc378110a256b932a9c6cfab249c8bd47 SHA-256: 2967f8ed5c9ecb8bc7336470658c102fa3868a5b6bbcc01e0a4fd8679ef3afb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on Weebly subdomains, suggesting it is part of a link farm designed to drive traffic to various sites. The presence of a URL related to 'clash royale quiz answers' indicates a lure to attract users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://golowaki.ru/123?utm_term=clash+royale+quiz+answers
    • https://fuxilidunud.weebly.com/uploads/1/3/5/3/135314653/29484e685a408.pdf
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5fd18bc4e4887.pdf
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/c5ca6d1de.pdf
    • https://cdn-cms.f-static.net/uploads/4454811/normal_6038435f61917.pdf
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/0e513f0bdd433d.pdf
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/76af2c21b148.pdf
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/779225.pdf
    • https://cdn-cms.f-static.net/uploads/4406820/normal_605cba563c453.pdf
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/2865989.pdf
    • https://gewedawinun.weebly.com/uploads/1/3/4/7/134745389/piluvo.pdf
    • http://noxaduva.mypressonline.com/wordly_wise_book_6_lesson_9_answer_key.pdf
    • https://cdn-cms.f-static.net/uploads/4471488/normal_605672f180e20.pdf
    • https://cdn-cms.f-static.net/uploads/4490542/normal_602b44aed5429.pdf
    • https://likeledizu.weebly.com/uploads/1/3/5/3/135312051/db3988773.pdf
    • https://xixinuwomisit.weebly.com/uploads/1/3/1/4/131437484/6751537.pdf
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/47aa35f8db2.pdf
    • https://wujuwali.weebly.com/uploads/1/3/5/3/135326068/98f7b9b8f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vigavanoxe.onlinewebshop.net/91698292970.pdf
    • http://visevagopar.onlinewebshop.net/zagixu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d736.bin
912050fb0bc5a07c3176a44f4540b9ff88f6c6fcacaab198f0f8a171e6bdc9d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD736 5048 bytes
font_01_sfnt_off0000e877.bin
b41d2a2e25086811baa00e91b028a4d3557804dfcda52ed859113a307a541879		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 10868 bytes

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