Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64a4e1ea09a4dc6…

MALICIOUS

PDF

67.1 KB Created: 2021-02-24 23:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 44f720325fc2ac98a81e9f62367e0876 SHA-1: 2248c23160e4eba9567f5cc0f6fdb4fa9f076da3 SHA-256: d64a4e1ea09a4dc675e9425f4ea9ded318d941a8a8b0250e9ef7c3d9256ceeef
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/award?keyword=aguda+llana+esdrujula+online PDF link annotation
    • https://cdn.sqhk.co/pugipepa/gRMKgdE/98751255934.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/6da83e876263fa8.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/dU7pwDw/nba_2k20_locker_codes._org.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449424/normal_6027c19f4369e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_5fdc9b9055592.pdfIn PDF document text
    • https://fojuxiwo.weebly.com/uploads/1/3/2/6/132695505/8664335.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/bRkAic2/tuladuzerufu.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/OA9jajf/bugs_bunny_no_picture.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/W9jb9ii/desomegudoratalugov.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/Yidxjiy/all_pickaxe_enchantments_minecraft_1._14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fd663ad01a7e.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/bidenegitakinirid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6012c15933935.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/ropafebadabewiz.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/hanhgib/39043866061.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/ha1eha8/5394814347.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/iggS6dy/1991091313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447465/normal_5ff60637a8dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_602d605259f0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC783 5056 bytes
SHA-256: ba264133d1e32ca2978335cfbea43ded795fc5905e532a43404f2c9b4721e9f3
font_01_sfnt_off0000d8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C8 11356 bytes
SHA-256: 623b651033e55e15e50d5aa8f304efb79ace603dc94909152af97fa49ff4ffc6

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