Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c922dde40801a0…

MALICIOUS

PDF

45.6 KB Created: 2020-10-30 02:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 260164aa6b58bf7f6b2e3a0f413e2cb9 SHA-1: 654a5368e7d6166ae8508e6d7dffd3b34e2323bd SHA-256: f5c922dde40801a0fc7b4505b36497ca252647094132f87593fbfd468a51565e
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.me/123?keyword=ffxiv+white+mage+rotation In PDF document text
    • https://pulepuvoko.weebly.com/uploads/1/3/4/2/134266128/fozoxapakup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5f95f4072d7e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sikuva/86619400795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3141/3415/files/forufawesekaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/kemulekupejoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/99796195484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2006/6209/files/orion_starshoot_autoguider_pro_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/lanatomie__colorier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc28e023-1d03-4f80-bd14-02b62d748f0d/64604733587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9582/5314/files/47011010304.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/nigamonomewezaxene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/pezisifex.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/exercice_barycentre_1ere_s.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_off0000743b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743B 5144 bytes
SHA-256: 2684fba943b8b5915d9badf97c366a2287c2bd4b89b3c2672ea3c1d137fd7282
font_01_sfnt_off000085af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 10652 bytes
SHA-256: f46e00653f2f2313da3947fbf54e0a960ff33834b9dad249fc039937689cf402