Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6645aabcb1ce4ef…

MALICIOUS

PDF

42.3 KB Created: 2020-09-29 22:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f3d57c64b09e15e7480a21553f8512e5 SHA-1: b89b73981c53782dc4b464deb189906e884c6fec SHA-256: e6645aabcb1ce4efcbd6aa5a1303f717c97d5320de64e0facf44aec0594e8d0a
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://ggtraff.ru/strik?keyword=the+tempest+summary+pdf+free+download In PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/xujegupano.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/60958940062.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/15358779265.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/90833623555.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/37057575479.pdfIn PDF document text
    • http://kikinuje.thecountryclubonline.com/uploads/1/3/0/8/130813528/9628643.pdfIn PDF document text
    • http://marugukib.mgtconcepts.com/uploads/1/3/1/3/131383476/bumoxiz.pdfIn PDF document text
    • http://files.russmorrisfinancial.com/uploads/1/3/0/7/130739621/5213c7d9662.pdfIn PDF document text
    • http://files.watar-ksa.com/uploads/1/3/1/3/131383945/7176104.pdfIn PDF document text
    • http://xozuj.koshtex.com/uploads/1/3/1/6/131637921/3809588.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/1/0429/9236/9823/files/59653884318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/84476727171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/twin_bed_fitted_sheet_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/80657155239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/98120741989.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_off00006701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6701 5424 bytes
SHA-256: d11364c3d971cdbd9dddb3b2e0ec2872402de7a212a7c56c19b3cbaf7eb8a6bb
font_01_sfnt_off0000795e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795E 10108 bytes
SHA-256: b32043233460e323cfe7eb764d40e9e97a70b74732ce9a5f48cef9385a78fd10

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