Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f0bc464ed5dc5c…

MALICIOUS

PDF

39.1 KB Created: 2020-09-10 02:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e2752b9004e64d7410c9a082755310f5 SHA-1: bfa5c2fe3fd86c2c4b13b27f60402bc4ca402ea3 SHA-256: 84f0bc464ed5dc5cc234df819c116e610fcffe3932541255d9d84c34eddb757c
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/wix?keyword=geometry+isosceles+triangle+worksheet In PDF document text
    • http://zasofegiv.malgosia-underwood.com/uploads/1/3/1/4/131410685/mojaregumevidemowe.pdfIn PDF document text
    • http://files.isabellecallebaut.com/uploads/1/3/2/6/132681836/gedajebe.pdfIn PDF document text
    • http://files.hillsboroughmusicfestival.org/uploads/1/3/2/6/132681976/ad2fad.pdfIn PDF document text
    • http://files.leejeehee.net/uploads/1/3/1/4/131438234/toxejimerolabamake.pdfIn PDF document text
    • http://files.egdesignandphotography.com/uploads/1/3/0/7/130776001/d0c4f6a.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/1/0430/1206/3391/files/simagenor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/10530871087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0603/3063/files/wixabixukipuxurug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/responsive_web_templates_html5_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/64484134859.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7041e4_ecd7af08b7ed48c9baa9980a204356f9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/98e298_a9be5b4c3c014176b2f16df0688b8559.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_63fb32eb5a39498183efb7eba3383b7b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0f1814_a427925da8a842e5a030dea6c87d57bd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/19103d_3b4252dbd76c4ca996c18b7dcdb45a47.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_off000059fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59FA 5500 bytes
SHA-256: 1989764fe849b9762e7e20e4dc0d6ba5b643018ef4c6f21d1f7cd91e3df9ed57
font_01_sfnt_off00006ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA3 10104 bytes
SHA-256: 05949d3f00f6d8e613d0c29f9b1398ac2eeb639d6f67f8fd2ccfaa975293b427

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