Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fb91d8a9eab856…

MALICIOUS

PDF

41.3 KB Created: 2020-08-26 10:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 381f89fb94c764171046696667194e4c SHA-1: 80b994572b19e7bae8e3c9e951a06f362e2b84d8 SHA-256: e2fb91d8a9eab856579b1a2abf5b38be97cfcb43d11ace34d4f83c4614ad6c12
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.club/pify?keyword=etienne+guill%25C3%25A9+gourou In PDF document text
    • http://files.embracechurch.co.uk/uploads/1/3/0/7/130775868/b9041dc20da0fc9.pdfIn PDF document text
    • http://vufifa.augustrise.com/uploads/1/3/1/4/131437850/kopajurefo.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/1/0448/9661/6615/files/creative_cloud_no_credit_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/37547734831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3241/1298/files/cash_flow_budget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/pathway_aterosklerosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3640/2079/files/jotevim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/95718092766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/17177010996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8133/4935/files/autocad_tutorials_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/xakixunoxobetivagit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4540/2277/files/cutting_tool_angles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3044/5979/files/anaesthesia_journals_ranking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/planck_s_law.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_off00006253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6253 4564 bytes
SHA-256: 706599a13845e3f3a3e2d47cead2d75acd880acc27dc97932102726d0b6019ca
font_01_sfnt_off000071a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 11956 bytes
SHA-256: ddeb98e631c6dd37381492e0f9636e26fc9fe615a4ca052d516c1e579505456b

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