Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb82d77cc158e00…

MALICIOUS

PDF

78.7 KB Created: 2021-01-26 03:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4919fc7eae3844362c07c512d1c16038 SHA-1: fdb8e51f696fe26561a4af1ab1aac42b6726668e SHA-256: bdb82d77cc158e0030c7bd793b2cd562283334649390d199e2e490c78d7b8f37
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://baarspo.ru/aws?utm_term=physics+equation+sheet+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387814/normal_5fca1b517ccd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5fe103e70b532.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/GVzkfig/spin_the_bottle_challenge_baseball.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fdaf08e6d293.pdfIn PDF document text
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/suvemutedaduxe-wukifutedixufi-kefopex-kufiretedep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5fefb37891a53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481061/normal_5ffd46529d953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fc5bbcba9056.pdfIn PDF document text
    • https://xananitape.weebly.com/uploads/1/3/4/0/134095977/ketazoxitilegitajed.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/42390427718.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5ffdefe9d2fda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489407/normal_5ff91b9540636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501634/normal_5ff5ffe06f507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesizemub.epizy.com/blocky_farm_mod_apk_latest_version.pdfIn PDF document text
    • http://gigavolaxo.epizy.com/nemalowusatarixegejatono.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_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 5344 bytes
SHA-256: e1c94c6834feed84890605a4c95a0db3fa215db1597c58cd7f0ca04bd6788bb9
font_01_sfnt_off000109e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 10808 bytes
SHA-256: 22a9455284e3b8f4dd9ed59bba188abb7e08a52af818cceaeb501b1b34178ed6

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