Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f9b4a1c9fd9237…

MALICIOUS

PDF

68.4 KB Created: 2021-01-24 03:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3855f73a189fd1de0d6c96bd02a13672 SHA-1: 8b38de4fc16199f06a9f77fc7dc1f760346d660d SHA-256: c9f9b4a1c9fd923712ca1fd344ad4cbb18426b5c2dcba0f16a970c19c165937e
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://cctraff.ru/wb?keyword=how%20to%20play%20texas%20holdem%20poker%20at%20home In PDF document text
    • https://woraragupawajup.weebly.com/uploads/1/3/2/6/132681931/kivazetipa_luwikuwoji_disid_moguno.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/K6iauDk/gotiwipajugesuv.pdfIn PDF document text
    • https://site-1175908.mozfiles.com/files/1175908/22389133867.pdfIn PDF document text
    • https://site-1180999.mozfiles.com/files/1180999/animation_portfolio_website_templates.pdfIn PDF document text
    • https://site-1177462.mozfiles.com/files/1177462/football_predictions_week_11.pdfIn PDF document text
    • https://viwosexoteb.weebly.com/uploads/1/3/4/6/134631328/96d8602.pdfIn PDF document text
    • https://site-1218469.mozfiles.com/files/1218469/xafemerewatifiba.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/pawiduzamerijikaxen.pdfIn PDF document text
    • https://site-1259686.mozfiles.com/files/1259686/nephrotic_syndrome_guidelines_kdigo.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/d9883bdd.pdfIn PDF document text
    • https://site-1251451.mozfiles.com/files/1251451/animal__crossing_hair_guide.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/vinivuxo/95161145011.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/management_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/82420340107.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/beturofusuruwefapareboji.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_off0000ccb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB3 5488 bytes
SHA-256: 0b769a7d23a6583808f8674a61903d6982ad38c39f6adc951944b69c4c60172c
font_01_sfnt_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 10476 bytes
SHA-256: 65380947845bdb39565797dff59ae75372878bc6d6f2bfc08d937799091f4dc2

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