Malicious PDF — malware analysis report

Static analysis result for SHA-256 0718fb89286993b0…

MALICIOUS

PDF

41.4 KB Created: 2020-10-12 09:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 39f54747b11f58532632f79bf5a35fb7 SHA-1: ebddea15ab3dffe317d8ba425a535a1216ed9604 SHA-256: 0718fb89286993b0ee5f0122f86a65022dce4f62014a1115fda314ed4e82f7ac
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=gold+plated+silverware+from+thailand In PDF document text
    • http://files.missinglinkbrewing.co.uk/uploads/1/3/2/6/132682441/2c8aa102487.pdfIn PDF document text
    • http://waxuz.una-atl.org/uploads/1/3/2/6/132683289/nekupen-jedojije-lapoxoj.pdfIn PDF document text
    • http://files.southfield-lofts.com/uploads/1/3/1/4/131437056/3233293.pdfIn PDF document text
    • http://files.thelitwritinglab.com/uploads/1/3/1/4/131406578/1e2879c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b805c2-5d1b-49ef-8381-6db1287efeca/mevupotawudukazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ce519e-04bd-4605-bf3d-d75781680a8c/vomofoxudex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e847472e-3b61-4f25-8d3b-45ccd301dc43/85132045941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a56c71-fbc7-49d7-8f5c-ba434ee829e3/kozutama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc23a47-3207-4332-b23a-03d868fc15a9/fukipoduxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b28f212-5d83-4ed0-b73d-df3337759809/rufurisofowuluraxuwat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f012c6-d13d-4cf7-af41-ae26e8d2d055/zexajurawobubas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35439dd1-f96f-467b-b612-ed68617236f3/vudurasukoxitezesad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/44446081947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/eset_antivirus_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/features_dramatic_monologue.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_off0000638e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 5464 bytes
SHA-256: 79bc08ed154a70a223e2545c72f2a895a0f784c191a879fb20f9e2174f246162
font_01_sfnt_off00007620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 10212 bytes
SHA-256: 2065da198912fca2e0fd302f48c61bd6909a5000de94d1aab8cf488e3041e3fd

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