Malicious PDF — malware analysis report

Static analysis result for SHA-256 f152cce907bf5dd9…

MALICIOUS

PDF

42.1 KB Created: 2020-10-09 06:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8acdd28bfefa6ebce3502fe4fb728cfc SHA-1: be25eca049a67c8f306f7f3c7c182b1036894173 SHA-256: f152cce907bf5dd9906dc3b37221add65bb0fc0c2c084924d146df3f6f0ea084
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=solving+exponential+and+logarithmic+equations+worksheet+answers In PDF document text
    • http://files.kijasalon.com/uploads/1/3/0/8/130813913/tukujorobup.pdfIn PDF document text
    • http://mevavina.omahadeckcontractor.com/uploads/1/3/1/3/131379256/5149534865d553.pdfIn PDF document text
    • http://files.prompt.ca/uploads/1/3/2/7/132740716/bifoxulukenenipanes.pdfIn PDF document text
    • http://zekeg.raamarchant.com/uploads/1/3/2/6/132695550/filaj.pdfIn PDF document text
    • http://boxeto.mentalhealthweek.club/uploads/1/3/2/6/132681431/soxajifibawep.pdfIn PDF document text
    • http://files.taupobiblechurch.org.nz/uploads/1/3/0/8/130874097/8fe4cde900f4.pdfIn PDF document text
    • https://site-1041682.mozfiles.com/files/1041682/xobipeseliritop.pdfIn PDF document text
    • https://site-1036921.mozfiles.com/files/1036921/48593759937.pdfIn PDF document text
    • https://site-1040984.mozfiles.com/files/1040984/26348307222.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/1/0482/6290/6017/files/39439180019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8059/0521/files/sotapugukaxutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6454/1852/files/bexoxerogumanipiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8330/8442/files/wikepa.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_off00004e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E05 6000 bytes
SHA-256: d0b9baa8701bea1d44a9be988b90633835c1bb879c5a9b7d7ec6f20cf0078b58
font_01_sfnt_off00006259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 10224 bytes
SHA-256: ff6e66c3fdf3dc2fbeb11e937e5f86e6fcd029fbe34ce406a0dfc6a12f63950d
font_02_sfnt_off00008567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8567 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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