Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8ba44f96aac13d…

MALICIOUS

PDF

52.9 KB Created: 2020-11-02 23:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c2d4637ef186bacdb1bb908fac512667 SHA-1: 9d2be4f80581da0017237925b4edc78879e3901c SHA-256: 9d8ba44f96aac13da5ffa4688c97eb747aa68d485ef7cc8203debfe2b40a0336
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=venom+streaming+2018+free In PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/vafupaporejuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dec4ec4-b3d5-448d-b405-2782d1a9d1c0/walimefobasavoveloku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09c55d5-3a21-4941-97f0-2b22a3091bc0/loxowitasiguvetudesawozer.pdfIn PDF document text
    • https://s3.amazonaws.com/rimadefule/kuvijilitop.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/th8_war_base_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5459/4731/files/2972916892.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/gefakofodolonivo.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/26697588327.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/28504923182.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/fegikuvofilov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED1 5540 bytes
SHA-256: 2fda022c2f79f5a27f557f4a41044754af891588908410e7c4496a379bf44182
font_01_sfnt_off00008194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 2316 bytes
SHA-256: 0862e89ad58e7f1a0d018bdde91276dde0c1499341f426941c024f45bfc883b1
font_02_sfnt_off00008b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B84 11284 bytes
SHA-256: 079bf1bcfeb9e623d11b7586c17b1f5179fa1ba116962f2c08bc27be5ad1196f
font_03_sfnt_off0000b233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB233 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8