Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ec51630eddc33f…

MALICIOUS

PDF

42.7 KB Created: 2020-10-09 01:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cc33d181510183e7879763e225600003 SHA-1: 1f9415c6a8c088824cbfd7e0b87cf9accf89e420 SHA-256: f2ec51630eddc33f9f8183d9d3a58c8dd66052fc01fd6ed1e781f82e6cf64343
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=3d+pen+templates+pdf In PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/paxeraxemu.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/53602177181.pdfIn PDF document text
    • http://files.wildernessmysticism.com/uploads/1/3/1/3/131379118/vesaluf.pdfIn PDF document text
    • http://files.ronnieli.com/uploads/1/3/0/9/130969176/wawipifekapovas.pdfIn PDF document text
    • http://larosadut.hdtrailersolutions.com/uploads/1/3/1/3/131379655/5d9b55a.pdfIn PDF document text
    • http://files.alpinespringscounseling.com/uploads/1/3/2/3/132303009/358561.pdfIn PDF document text
    • http://files.sdmny.org/uploads/1/3/1/1/131163669/kajedogobixikadaxago.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/1/0428/7404/4579/files/clue_harry_potter_edition_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/qa_analyst_resume_manual_testing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1522/8570/files/lowufifoxejesuvisaxojexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1859/8053/files/shiny_stone_soulsilver_serebii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0925/3791/files/estadio_da_luz_pes_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/jasiwukoradifixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/42829854963.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_off00006a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5A 5160 bytes
SHA-256: e6fdf6cc604a31b78e35d202b80b5ad0848c624188fd68e939d2fed0e8a4f983
font_01_sfnt_off00007bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD6 10160 bytes
SHA-256: 77f336bd709d3da9ad018929d3a42a27055b014caf7ea73693681a475dd16760

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