Malicious PDF — malware analysis report

Static analysis result for SHA-256 b722c67f8fa86871…

MALICIOUS

PDF

72.1 KB Created: 2021-02-27 13:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d38a25eb28a29c25fc348090ec72e3b4 SHA-1: 06711c672f6888ae3da9b2b8d58bcb2d0d142bca SHA-256: b722c67f8fa86871ba7d3322220bb5e034a93176a719616c35fcc7ef705636f0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=agendas+alternatives+and+public+policies+1984 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371807/normal_6023bcb7af983.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/jjaEoje/pulse_secure_client_latest_version.pdfIn PDF document text
    • http://shoop-fr.ru/zuwigatofesutagi7oy8m.pdfIn PDF document text
    • https://kajabukege.weebly.com/uploads/1/3/1/3/131379037/1632772.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391317/normal_5fe0077f30b7f.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/MeiaZhc/vomogosuduluta.pdfIn PDF document text
    • https://cdn.sqhk.co/belebudetub/3hhiggd/top_100_ps4_games_on_ps5.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/jfhhOja/jarurebojajatepevini.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/jirhjgi/my_guitar_tone_sounds_muddy.pdfIn PDF document text
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/wajugak-dubuwujagid-mabugesef-sedawugu.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/hgUhaVq/87020068489.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/iciehkE/create_a_todo_list_in_react.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/eV70hcj/kuzegakekak.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/bugutaj/ewg_cleaning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/biblia_catolica_descargar.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_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 5920 bytes
SHA-256: 0df00975084d1cc9e89d7012060d89cb7ccbb8f013ee45bee5311d77eb2da532
font_01_sfnt_off0000eff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 10412 bytes
SHA-256: b76a4e74a0761e7a0137e1a8350e68ecdfce3beaaf298e61f8f67b50b6b31bcf