Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f1499067512f4d…

MALICIOUS

PDF

41.5 KB Created: 2020-10-01 06:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 241f245abe7f16a83043fcd3d70c6107 SHA-1: 336fcdf358f9b074adda669a7d9896e76331aeda SHA-256: c2f1499067512f4d9026f795705aee7747039e73ea60c0fad9fda31b873df127
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://cctraff.ru/strik?keyword=elementary+book+report+template+pdf In PDF document text
    • http://files.mantorvilletheatrecompany.com/uploads/1/3/1/3/131397960/589e26eb4.pdfIn PDF document text
    • http://files.sbartlett.com/uploads/1/3/2/6/132695732/8a147b.pdfIn PDF document text
    • http://damilog.perryia.org/uploads/1/3/1/6/131606624/baruxid.pdfIn PDF document text
    • http://files.jonathanacollura.com/uploads/1/3/0/8/130874338/kesofexekasitix.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/fimirixuzedaninepufaw.pdfIn PDF document text
    • https://site-1037122.mozfiles.com/files/1037122/91850521540.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/77311070601.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/60247780086.pdfIn PDF document text
    • https://site-1038690.mozfiles.com/files/1038690/11628687479.pdfIn PDF document text
    • https://site-1036839.mozfiles.com/files/1036839/62213412585.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/70617431457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0252/1494/files/99493512133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6123/3832/files/kitaxetomabovinol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5647/1720/files/venom_2_full_movie_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1125/files/afrikaner_nationalism_essays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/65224541895.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_off0000664c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664C 5272 bytes
SHA-256: 487b06fee2680bb1a326c7cb9de28120170866c853c6212d9480a22306ed5d25
font_01_sfnt_off0000782a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 9648 bytes
SHA-256: 5d5721950483fc3ee70f7b91799299a238b3a514e719b38b2a32c11953e23163

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