Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc9dbb04fa047ba…

MALICIOUS

PDF

40.7 KB Created: 2020-10-04 15:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: abd79d9d83b058af7000ac9d2cd5bd89 SHA-1: c6ce43d28ccfb07c25d66701b7081591036d0c22 SHA-256: fcc9dbb04fa047ba5250e48e1a09e6a85802d21090c6eac596a620c377b7fbf3
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=pdf+descargar+editor In PDF document text
    • http://vugodoj.wildhongkong.com/uploads/1/3/1/4/131407089/1967304.pdfIn PDF document text
    • http://vowoxeva.southdevonslinglibrary.com/uploads/1/3/2/7/132740267/feratasupa-savepaxifikano-rusipuzit-kepazeve.pdfIn PDF document text
    • http://danixow.greensavannahstables.com/uploads/1/3/0/7/130775403/serazi.pdfIn PDF document text
    • http://gulululi.academywoodshome.com/uploads/1/3/1/8/131856439/kopep.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/1/0440/7495/9000/files/maytag_dryer_support.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7102/8896/files/60510901799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6336/2980/files/long_langstroth_hive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4835/2930/files/8.5_angles_of_elevation_and_depression_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20fbd33-28e0-49fa-b877-3821ea766575/dabobixozotodepatunolop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff52f2e-4f55-4fef-9811-74c407b1bdaf/gagevadasubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d7bb3c-d2e8-4a6d-a11c-b2a29d494863/93774640764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8851/8562/files/the_empty_space_bakersfield_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4019/7784/files/sulogovazunebumov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9322/4344/files/kegiluf.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_off00006272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 5156 bytes
SHA-256: 8c604e6e012b085db832213b9e76295c9a0fa86bd88e2243fa0f0e8ad02c8bb9
font_01_sfnt_off0000740f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740F 10500 bytes
SHA-256: ec20de5924d5721c2705aabbc5f7d36634464b22f46d68bb90f9f60ec77d9cbc

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