Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1c87bb7b7ab93c…

MALICIOUS

PDF

44.4 KB Created: 2020-10-01 10:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2b0a73d40b78db597bf7a0a47aff1447 SHA-1: 79f13e694641392b6d4b69530f29fb8a069948b8 SHA-256: 3d1c87bb7b7ab93ccf03d7d7136b4b58da019c9b24dd03012706d995803eb25f
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://cctraff.ru/strik?keyword=test+de+raven+pdf+completo In PDF document text
    • http://kuratexiz.winstonheinrichs.com/uploads/1/3/0/7/130739163/9630284.pdfIn PDF document text
    • http://taxevaveb.dazcoautobodyclips.com/uploads/1/3/0/8/130813528/xebopawaboso.pdfIn PDF document text
    • http://files.mccaulleysminidoxies.com/uploads/1/3/1/4/131410662/nerutelulifojuxeri.pdfIn PDF document text
    • http://files.egpscotland.org/uploads/1/3/0/8/130814345/2984936.pdfIn PDF document text
    • http://files.robertsfamilygenerations.com/uploads/1/3/2/8/132816036/f24e537.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/fuxeniboxava.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/81970895154.pdfIn PDF document text
    • https://site-1038693.mozfiles.com/files/1038693/lofirosojeju.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/1/0431/7400/2848/files/luzowalewagek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5253/8787/files/mayabazar_old_songs_free_doregama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/mubixarikux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/65200106388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5694/2242/files/bipizefixeriwim.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_off00007005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7005 5312 bytes
SHA-256: fabda10175ff6ba7f08c970a6cb048dc636d865a14c4bc4d94dfcfe4218ed139
font_01_sfnt_off00008207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8207 10284 bytes
SHA-256: 8d2620254878f818dccc55369db673a7b84387e1d95b6f1438c331ffac72ccb3