Malicious PDF — malware analysis report

Static analysis result for SHA-256 7895287e9fc214ac…

MALICIOUS

PDF

68.1 KB Created: 2021-02-12 16:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f4c1a22b1dce58489d7725dff96581b0 SHA-1: 905cedc72147efadb009d4fb2e572197d4eac82b SHA-256: 7895287e9fc214ac6bf65556445abab1fd75c9307f3a2f5e4f46a05585d0820e
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=cdpo%20full%20form%20salary In PDF document text
    • https://wazexusevawixi.weebly.com/uploads/1/3/0/7/130776334/wawasenebalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_601794a6ac672.pdfIn PDF document text
    • http://freshka.fun/6093404698exzf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392193/normal_5ff480eb33213.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495269/normal_5ff9d6c33fabd.pdfIn PDF document text
    • https://muwilumi.weebly.com/uploads/1/3/0/8/130813533/jaxabapanomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5fcb1d6ddd218.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/adliijg/trade_island_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/iageijS/93709377362.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/R03gkD9/battle_royale_chapter_2_season_4_hd_wallpapers.pdfIn PDF document text
    • http://sungo1.space/befujonamuz.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/eKigwBX/naketexemarilobudukaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417023/normal_5fcb3a806772b.pdfIn PDF document text
    • https://cdn.sqhk.co/modesinilofe/rVj82if/65096444975.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/cidpLhh/5980548430.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_off0000cc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC96 5196 bytes
SHA-256: c87d93b4bdfa7125e44f689eb0f6f1fbe989fd4e8a079c4fea3679f0341c408b
font_01_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 11120 bytes
SHA-256: 22a65265d1a84e7418330783bb9663b7559cae2c59147b356d46b8edb433ca3e

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