Malicious PDF — malware analysis report

Static analysis result for SHA-256 312d3017eea88ae2…

MALICIOUS

PDF

45.7 KB Created: 2020-10-25 15:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: b556c64dbb4a884ac4b7a0160ce16ca2 SHA-1: 7b706ae70cbfc1552e81638971cbee8dee7d772d SHA-256: 312d3017eea88ae23b077eff06763a0ef6e60841e4d8d810550af0f530fc27ea
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.me/123?keyword=telegram+%25D1%2583%25D1%2581%25D1%2582%25D0%25B0%25D0%25BD%25D0%25BE%25D0%25B2%25D0%25B8%25D1%2582%25D1%258C+%25D0%25BD%25D0%25B0+android In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/e672fbfe327f3.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/b83e0d080ab5b8c.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.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/mupukesunobaga/98059963756.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/kipixizenelejabunu.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/jivigimafunubasadusegoj.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vaseg.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/denali.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/820376172.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/penguin_readers_level_3_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/sample_career_aspirations_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/40226365150.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/makatev.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/mezuperixoxib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7028898-ecbe-4aec-9301-574f553d93a9/84896519206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4d964d-a77d-4482-8bd5-f2d91c6df1f2/blackboard_caracteristicas_ventajas_y_desventajas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d410ccd-27d5-4587-9fb3-d3dd766a9a04/jejixejepowawasuwejedajin.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_off00006488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6488 5864 bytes
SHA-256: a5188fffd7748c53fe97790021c7e3eba1fff4299a2248e13b82d15525c6b6fa
font_01_sfnt_off00007786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 15448 bytes
SHA-256: e2233a5303f9564406aa87cd525c5a787a9657d36865ee04bb1a2373a0d35d85

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