Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e4ff5641eb7fba…

MALICIOUS

PDF

68.5 KB Created: 2021-01-28 09:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 52d57a32cc18da85ad8d9733b1192a22 SHA-1: f3754fdaa2d98fa74b2698085d0ce4e2561bf6a4 SHA-256: 57e4ff5641eb7fba2f594a6dfe25ec1e786e74ad47e7e0b56e50529264faf529
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://maypoin.ru/wb?keyword=lesser%20emerald%20spellstone%20hearthstone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5fe77620a5dd2.pdfIn PDF document text
    • https://momobamuv.weebly.com/uploads/1/3/2/3/132302987/fapatuzerarewa.pdfIn PDF document text
    • https://koxiguxizabi.weebly.com/uploads/1/3/1/1/131163763/bizonev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445733/normal_5fe25ea824eaa.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/ketipedat-kesoson.pdfIn PDF document text
    • http://vegekezivujid.22web.org/puxopefekakamukijewe.pdfIn PDF document text
    • https://pomaxobizo.weebly.com/uploads/1/3/1/1/131163853/sogojejozadu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/closers_survival_guide_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/61958334304.pdfIn PDF document text
    • http://vopevufiwi.epizy.com/breakup_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/angular_directive_multiple_templateurl.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/46669586617.pdfIn PDF document text
    • http://sugexure.rf.gd/dagavo.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/bourdieu_forms_of_capital.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/orchestrator_getting_started_guide.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_off0000ce4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4F 5140 bytes
SHA-256: ac120ef8b2227ffaf7eaf9c50a613403f3175668e112dcb6bba1866dc0e10054
font_01_sfnt_off0000df99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 11012 bytes
SHA-256: b3f3098c48d7ce50cbc4e10d69b9f1290e0982439c26d0e8b029554212bcad4b