Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bc774b421ec784…

MALICIOUS

PDF

45.0 KB Created: 2020-08-17 09:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8b736e0163253a74ac788de39c951ed2 SHA-1: e5ad6e7f18215a6aab8ca2c4e390d698992aa7ed SHA-256: 82bc774b421ec7847cd8a551999dca7c5320774b65314bb88a5d0fc386c07e89
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.cc/pify?keyword=black+desert+mobile++app+store In PDF document text
    • http://tufobin.carterplantationhomeowners.com/uploads/1/3/1/1/131163960/lajizonijenufotu.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/1/0428/9835/8432/files/70278744099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/equalization_and_compression_for_voice_over.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/95789865650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/nonolisunonowosolabaxaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/96463102198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/buddypress_documentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/datupelorugalawemud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/78703367913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/gagufozelelegugasej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/metal_logo_quiz_answers_level_34.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_off00007122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 5472 bytes
SHA-256: 9357bcf21663e26c6f26f2382660354fe064e759ddd0691fa33ac405789d46dd
font_01_sfnt_off00008397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8397 10068 bytes
SHA-256: 0130b17d3785749d23d1a655b182294f10ef53be7ca2fe52183683f509efbdd0