Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb26811c3d9cabc…

MALICIOUS

PDF

44.1 KB Created: 2020-10-22 21:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a75e94316e6f07d8090af2d392a9d604 SHA-1: a56369730a34da33294b9e701fa144076c4baaff SHA-256: 9fb26811c3d9cabc9292e9af08333f09e050a8c97f2bf5823a00c1fa9e0c1d30
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.cc/123?keyword=facebook+lite+apk+download+all+version In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9031774.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/2163499.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/35a831c83125da.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/zegilirikisule-kaginelale-tafamizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f8d4d168c180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8def3ce0918.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/0cbd7f35736ab.pdfIn PDF document text
    • https://nibobesexetew.weebly.com/uploads/1/3/4/2/134266191/305024.pdfIn PDF document text
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/tarafapebod.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/fasanag/90802683965.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/vixinogupivuni.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/list_of_formal_words_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47ed2d7-51cf-40ad-925f-b5ff0e44e789/gidanema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42499907-5314-411e-acad-7a7083cb3bf9/french_plan_xvii.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/partnership_accounting_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/free_lsat_logic_games.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/86336282801.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x502B 5376 bytes
SHA-256: a3d628f98a7a1c08a1e08f12c96b5e880b874cde1635dc145531c9ed1ea9e52f
font_01_sfnt_off0000628c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 10480 bytes
SHA-256: ec05ae319d4de210589bdd62614c85e6489fb912701db14bd33fe5184a3cee53
font_02_sfnt_off000085fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FE 18468 bytes
SHA-256: b5888231747580135bc936fc53053745eddd78af17f9ccacd0ceffc5e3b56106

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