Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c256a062b4fa96…

MALICIOUS

PDF

49.9 KB Created: 2020-10-07 18:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9cb51a38e0f9d7367b4b7333338ac3d1 SHA-1: cf8364f869f16b13b647410633588ccc4f4a5114 SHA-256: 74c256a062b4fa962b7ba305621faac325de56983033db5b94f1a6038a66b553
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/pify?keyword=d%2526d+5e+grung In PDF document text
    • http://wiredawuw.girlbossevents.com/uploads/1/3/1/4/131453723/5101519.pdfIn PDF document text
    • https://site-1038863.mozfiles.com/files/1038863/venalunanadujifixori.pdfIn PDF document text
    • https://site-1038413.mozfiles.com/files/1038413/jimupi.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/ropekovajekonevalapa.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/novema.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d423b80-ded9-4036-a67c-099769f68630/vawog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6194a904-0b97-4d50-82d0-f976bf07306b/javebalujaxobofazowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4f89c2-02b7-49d5-83e7-342d2d6ced55/95498485481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ddc8e9-25d4-44b8-ba7a-b1c954957882/70334245732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82297775-651f-4ce5-b860-c0ffad6240c7/67213416495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8942ed-b9be-43a1-b75c-b8747b02dc25/53960013396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77cf60f-0deb-4497-85cf-d8ae3d06d10a/benode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4103f7-0368-475d-996e-1ac984667dcb/60612079245.pdfIn PDF document text
    • https://medlineplus.gov/vitamind.htmlIn 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_off00008a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4D 4156 bytes
SHA-256: 4137e011fb50e940388b7a91a31e36f70741d8ce55ef6fbc7fb0314564e06879
font_01_sfnt_off0000987d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x987D 10284 bytes
SHA-256: cd2f378bf727029d79a8058a1fd7a0f03a873711f4c028cad2d6a2d8312bb7ab

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