Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54e29179669070d…

MALICIOUS

PDF

48.3 KB Created: 2020-08-09 08:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bb9195f6d5d970f897352e6edca9dde8 SHA-1: 23dbf36ecbc615f3fe1fe1f3285fd70cd4f2fedd SHA-256: c54e29179669070dd25a46ed89f667a44d74441f567eec9f2bc6006cd46daf58
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=kvs+biodata+form+for+interview+pdf+2020 In PDF document text
    • http://files.thecalmscribe.ca/uploads/1/3/0/7/130739131/podewaxasu_pidawamuz_fedokakil_bopenome.pdfIn PDF document text
    • http://files.christopherbmooneystudios.com/uploads/1/3/0/7/130740142/5d6803ac7.pdfIn PDF document text
    • http://files.bigskycafe.net/uploads/1/3/0/7/130775795/9427104.pdfIn PDF document text
    • http://files.transformyourdogllc.com/uploads/1/3/2/6/132695200/1625b16c3b9e.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/1/0428/7247/1715/files/ritos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0812/2280/files/defenitikemifanot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/xuxikupafuzokisusig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0309/1876/files/strategic_marketing_management_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/jigifajobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/solimadafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/perfusion_bioreactor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/real_and_complex_analysis_rudin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/nupipesuvulasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/dixanik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6896/5532/files/13896558137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/3842807996.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6701 5692 bytes
SHA-256: 5b6790dfba45b3c8ce9c7020b886cf040efb0821558be341b8a3011bd28ea4df
font_01_sfnt_off00007a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A67 10376 bytes
SHA-256: b3ca9d87291e4e4ce57bde8bbcda0743cc6ad714420a6fb9210872aacf5a8c58
font_02_sfnt_off00009dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEA 16352 bytes
SHA-256: 4682c4fc29adc5379a8b360eb1f778f63448c6171679888f86fc3aa0b695df4d

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