Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a2ae021cf0f51f…

MALICIOUS

PDF

66.2 KB Created: 2021-01-29 20:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f7050b96d68239e3f326bfd70e744076 SHA-1: de1c8b03a3cc911695f64d8b159c4d31c6ec622f SHA-256: a7a2ae021cf0f51f226adb6204d3b58eaeb1bb3122fbc678bbff55acfc3d8a1f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=wither+storm+minecraft+toy PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453329/normal_5ffe08dbd6a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_5fd70cfe1dbd6.pdfIn PDF document text
    • https://cdn.sqhk.co/jakadamalate/e8vIjiq/94602542272.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/jeughUR/cookie_clicker_2_cheats_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/jjgcjcy/miranda_lambert_bluebird_in_my_heart_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_6010d88188ade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394060/normal_5fc63f4301d9c.pdfIn PDF document text
    • https://zonotilikoper.weebly.com/uploads/1/3/1/0/131071062/kadulufotogagekaju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fcb273b132e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417519/normal_5ff55d077a682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_5fd918104bd7a.pdfIn PDF document text
    • https://zezevavibafano.weebly.com/uploads/1/3/5/3/135325489/7e1d9165af6e.pdfIn PDF document text
    • http://ourfutures.space/mohapatra_sociology_notes_download6o9gx.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/bjdidih/before_daylight_savings_ends.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_6002c27a5d154.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_off0000c7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 5204 bytes
SHA-256: cca0bdc373ea94cbc5afb51092fbc637bba50b8d9db846f94691d6d2f71e2369
font_01_sfnt_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 10296 bytes
SHA-256: a16b75dcbb0accacacb7a8bc2c54f4d3563e5929f3b06e30352be7e32cc260a4

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