Malicious PDF — malware analysis report

Static analysis result for SHA-256 9276c596b036de59…

MALICIOUS

PDF

41.1 KB Created: 2020-10-26 22:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8ef3df4c0d2542327f99f2ebecfdc366 SHA-1: 80fe2f607d665846f07031d1fa68b9868340e046 SHA-256: 9276c596b036de59bdc00f3aadad4ca2da882d8d918b552c04ea209e85b1d914
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.ru/pify?keyword=5+carbon+sugar In PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/6d8e31.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/deb8fa3.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/kinovatirajeruk_legumubi_ralovibipaniw_rixola.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/rexanebatuwig-juledip-zekuvorukuruv.pdfIn PDF document text
    • https://wabemogulumog.weebly.com/uploads/1/3/4/3/134384503/a2037c1dfea7.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/578ae893-c5f0-4692-b17a-74eab8b184f0/sikujojeledudol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acd558b-086e-4bf5-8d2a-62fb50525ae1/gafajes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171d9e09-fb83-41eb-b12c-676a32db25a9/31808946263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159988f5-212b-4b80-8022-32a4b69520bf/cancionero_ilustrado_los_jaivas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99b2e38-ba64-4343-b202-7f7309829f3a/54186183506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8283/4629/files/android_collapsingtoolbarlayout_background_image.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/99416663888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/wojonitafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbad849-d211-4270-ad8a-ede2c5ab037e/xijetojikegujisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138937c5-86d6-4806-836c-d32a8f8d5477/30919294226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac24b7f7-8486-468c-b55c-93785ca744f1/60419373961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc51ca6-2952-4b97-992c-2534c7f7ee00/76956777400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6f093b-6a00-4998-bf3a-0112bcf764cd/nosadafidigenib.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_off00006248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6248 5104 bytes
SHA-256: 3591cfdda325b27321e3a6f216613b9d10a5e8968829b7fab8f25961b0ed2419
font_01_sfnt_off000073ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 10660 bytes
SHA-256: 07ecdd786df45a83b699c9550ff1e9da2e4212edbceaae0d582063e2f0bc1e80

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