Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fed5f3676f0b0ad…

MALICIOUS

PDF

70.5 KB Created: 2021-02-11 14:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d68034e5b27ef4959f34559873d00b7f SHA-1: 3ba98f8334c1d3d71e3d6787cf20fbffa1026db8 SHA-256: 8fed5f3676f0b0adb688a774ce67fe7a3304bca27b0e82f4df9c1a47cd1d4e33
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=bruce+lee+striking+thoughts+pdf+download PDF link annotation
    • http://olymp-trade.top/36177890687g4k7n.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/jg09ifd/call_ringtone_app_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408858/normal_5ffe640b6ec9e.pdfIn PDF document text
    • https://vubupegizisave.weebly.com/uploads/1/3/5/3/135315261/843639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482418/normal_5fc9f9269ac4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5fcaa5b2c049e.pdfIn PDF document text
    • http://vuvopogawuxaxax.22web.org/dakadexa.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/hd5Hnh1/fonamawinovajamudud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413969/normal_5fe2e66baf5c2.pdfIn PDF document text
    • https://najonetawo.weebly.com/uploads/1/3/4/5/134522785/soduguje.pdfIn PDF document text
    • http://frut-tree.site/35056231849l1cm6.pdfIn PDF document text
    • http://igcopyrightverify.com/blackboard_open_lms_githuboj7rp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461766/normal_6023c9ec1c944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_602429251a091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_602222b19f135.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449178/normal_5fec064dad76a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nasewuji.epizy.com/news_reporter_salary_nc.pdfIn PDF document text
    • http://lurilufe.epizy.com/dolik.pdfIn PDF document text
    • http://dutugege.epizy.com/73135047751.pdfIn PDF document text
    • http://duxuvogavibu.epizy.com/dewalt_oscillating_tool_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 5504 bytes
SHA-256: 79b860ae64149bef27a88d0fe7877dc59ff5c51cb15b7081d1e79a026d03f7d7
font_01_sfnt_off0000dbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBC 10060 bytes
SHA-256: f8b6845cbb6f48766e21adbad545c6e13ef56f45fac5fde50f2819753649e42a
font_02_sfnt_off0000fe4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34