Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e53b8785ce3277…

MALICIOUS

PDF

83.4 KB Created: 2021-02-18 19:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c93436d4f3ecb52bc2acd36afe9461d2 SHA-1: 878385d7be03f119729d7a45e39de6432dda88ca SHA-256: c1e53b8785ce3277d78037f1f188f662894d8d23d869940871a864cebfb5852d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that, when clicked, directs the user to a page discussing how to hack mobile games. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of malicious intent, likely to lead the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=como+hackear+8+ball+pool+iphone PDF link annotation
    • http://shop-kid-toys.online/game_server_hosting_website_templatesfdn0n.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/xunojibudikevusudowod7tveg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_600b6b1f6a9ec.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/icuo4ii/color_cut_3d.pdfIn PDF document text
    • http://fimajixilozile.22web.org/section_14.1_work_and_power_worksheet_key.pdfIn PDF document text
    • http://youla-24.cc/circular_economy_for_productivity_and_sustainability1h807.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/ehfjijO/condenser_microphone_for_iphone_11_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/cHibhdi/sword_art_online_wallpaper_hd_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wamatasamegu/46058909235.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/jobejivuguzarorufubaze.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/determine_whether_the_graph_can_represent_a_normal_curve._if_it_cannot_explain_why.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 5124 bytes
SHA-256: 56668cfbd98b550a7b033c46d875153f296d2838640406df9c40971033e1cec7
font_01_sfnt_off00010e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E93 10444 bytes
SHA-256: 8b8e921d8f14ab4358e919a3d7a8d027bb026d43e29324c8f9d372e5c3f65153
font_02_sfnt_off00013256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13256 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c