Malicious PDF — malware analysis report

Static analysis result for SHA-256 b053b4c6ef8a734a…

MALICIOUS

PDF

69.7 KB Created: 2021-02-11 14:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0d85388515456fc55ac4dad394c1b6c7 SHA-1: 788509132bf17350baa33c1931cb236ec66407f0 SHA-256: b053b4c6ef8a734aac1b510abb6a84326cf560b7067f02d2588a0cdb7a843a66
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://bologen.ru/wix?keyword=bookmark+1+fahrenheit+451+answers+part PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366375/normal_601a509d909b2.pdfIn PDF document text
    • http://mybatut.store/shameless_season_1_downloadgsddy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393359/normal_5fe34b347495c.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/rDNsPgh/missing_you_meme_gif.pdfIn PDF document text
    • http://gta-msk.ru/aga_khan_university_hospital_lab_reports_onlineguvxx.pdfIn PDF document text
    • http://abanca-electronica.com/nunibaparikawejutusekec93wv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417039/normal_6006b08f23426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371025/normal_6005dd447ca93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_6022564a8ecc4.pdfIn PDF document text
    • http://daniele.store/sanvicente_administrao_financeira9hl2g.pdfIn PDF document text
    • http://nout-sale.site/wooden_surfboard_plansik88g.pdfIn PDF document text
    • http://springtea.space/vovunajetinuzinijimibp0ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416151/normal_600286339bf90.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/dutefitebavumavuzp9h1r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5feebe98c0372.pdfIn PDF document text
    • https://nipoxumafoji.weebly.com/uploads/1/3/4/7/134717148/6194b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5fe1cbb24a7ad.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_off0000d1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F0 5580 bytes
SHA-256: 0c749f70a901a6ca06a0a3389d4678fddce2902d3a78c6f8b146d1aa4f2c4527
font_01_sfnt_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 11116 bytes
SHA-256: 3a4cdf77c15d057e99c054ef937bfa21101229155fe26878c74f66ad78e8eb46

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