Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b1622c8bd2ab5f…

MALICIOUS

PDF

42.9 KB Created: 2020-10-03 18:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2e51266ca81e7ba9425cb5b3a46aa0c0 SHA-1: 0beec9dd5bc1d223072bd806d10f53bcdab2e55f SHA-256: 64b1622c8bd2ab5ff83ebee97487c9001e9bd797991a458fbad8e54638a09536
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://gettraff.ru/strik?keyword=dmc+embroidery+floss+color+chart In PDF document text
    • http://bovokiso.laytonlawfirm.com/uploads/1/3/0/7/130738625/nopuzadikuxup.pdfIn PDF document text
    • http://files.mainhomeconstruction.com/uploads/1/3/1/0/131070051/3814376.pdfIn PDF document text
    • http://xagukexof.momandpopeshop.com/uploads/1/3/0/8/130813934/dutedukida.pdfIn PDF document text
    • http://files.fr.thesparkcontest.org/uploads/1/3/0/8/130874087/guweropemi.pdfIn PDF document text
    • http://jixeva.designerconsignors.com/uploads/1/3/1/1/131164250/lixiguri.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/vuguniwazaguguvagevim.pdfIn PDF document text
    • https://site-1038961.mozfiles.com/files/1038961/kuwoberidasusuwokatav.pdfIn PDF document text
    • https://site-1039494.mozfiles.com/files/1039494/sebovinigupivuno.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/1/0483/2555/8436/files/7436948055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/publicidad_de_productos_artesanales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8588/7643/files/74325463960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/edenpure_air_purifier_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0185/0273/files/video_recorder_apk_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0599/6966/files/limits_graphically_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3355/9708/files/39890987202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6614/files/fuxazudezorumom.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_off00006899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 5500 bytes
SHA-256: 4a740e69abb4cf56b60a4aa3065a545d7a5f1ecfd1a8c29cfb4cfd23ce54412d
font_01_sfnt_off00007b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2C 10444 bytes
SHA-256: dc32aacc34bfaf97271c31778f1ac8f3ac1348f1f69453b8e30e1c98bd9d667e

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