Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee25c836f7d9693…

MALICIOUS

PDF

50.2 KB Created: 2020-08-23 13:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 78ee0b5ba9bccfd5192bb2256b7c9b1b SHA-1: 6787ce1d9226728b3828064b5e41f6fd0ea309a8 SHA-256: cee25c836f7d969380e7d54304907a25e58996313aac7de160e0f9c395b15fe1
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.com/pify?keyword=shia+islamic+calendar+2020+pdf In PDF document text
    • http://files.shojcc.org/uploads/1/3/2/7/132710784/rakopogixidevam.pdfIn PDF document text
    • http://files.meggiebichard.com/uploads/1/3/1/1/131163540/4243766.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/1/0432/4704/2715/files/nomevajikemawup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/56248339528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/rozeralujuzetab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5117/0457/files/awas_sahayata_yojana_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/vabalaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/pugimejesulogidotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/optimise_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/5920464423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/muxagegapujivolatabilafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/tokenikujuror.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_off000076ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 5772 bytes
SHA-256: 4daa5e9d037148b9f812dda3e2297fac7c634a431fcbb62316de060675527393
font_01_sfnt_off00008a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1F 15384 bytes
SHA-256: c0701ea6253a2e39e50cf06b33f8d2052efaca4f3856f3a5da7651f2efc67cba

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