Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc499f7205f1cce…

MALICIOUS

PDF

47.0 KB Created: 2020-10-03 17:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6385e8d4fffc850d74cc5cbb0a952d8c SHA-1: 0f19ef94363d18070d76b55535273a7beef231e5 SHA-256: cdc499f7205f1cce065a2c3b37fee51332448d7e032bb76ddd4166c035f23380
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=kia+sorento+workshop+manual In PDF document text
    • http://dixiwajin.hollykhawaii.com/uploads/1/3/0/8/130815017/sakor-kanirexuxenak-lagugerogokazij-donugeripun.pdfIn PDF document text
    • http://pomifa.familiarscapecod.com/uploads/1/3/1/4/131454526/riruruk_kalofu_zutenoxu.pdfIn PDF document text
    • http://files.foreverlivingdeliciously.com/uploads/1/3/1/4/131452750/fimaga.pdfIn PDF document text
    • http://rarebun.llanvihangelcourt.com/uploads/1/3/0/7/130738629/1322416.pdfIn PDF document text
    • http://files.debrapeekhaynes.com/uploads/1/3/1/6/131637658/514983580e90.pdfIn PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/21592384389.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/simopesimaruluvepepibaxe.pdfIn PDF document text
    • https://site-1042889.mozfiles.com/files/1042889/29560400573.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/bulunibe.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/wugokadiwelaw.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/1/0488/1062/3141/files/delta_bath_accessories_warranty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8654/4022/files/lugasojivobenerafesawod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2737/7561/files/nuvotamujukadijaridujon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9014/4160/files/kijabakenawirabebeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4756/2645/files/directions_to_watertown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7617/7051/files/egyptian_yoga_the_philosophy_of_enlightenment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/99769144783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2817/0917/files/92446399144.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_off00007a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A61 5184 bytes
SHA-256: 5c0d46be46936df0cfa7d1237d139eb8d64f29ad89e209b6716b30beb7fdc4fd
font_01_sfnt_off00008bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEC 10184 bytes
SHA-256: 2d550625e434b7559c78485d31b031a31c1650ae062383a5a32f278faabe9679

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