Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fb666b3a440d2c…

MALICIOUS

PDF

37.6 KB Created: 2020-10-08 20:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 64a86ffcf3b520e71154fc10f94fe31b SHA-1: f6a546c2f6ee5ffcd2d7bd0fae7cfdab2244bec8 SHA-256: 98fb666b3a440d2c8d5f672c0c88b96944748ee697a18f842865a73c86a37a9a
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/pify?keyword=white+flip+flops In PDF document text
    • http://files.shannonmcd.me/uploads/1/3/1/8/131856844/rutetipew.pdfIn PDF document text
    • http://files.susanlynchshamanicservices.com/uploads/1/3/1/8/131858156/991c5.pdfIn PDF document text
    • http://popumuwax.christinewelten.com/uploads/1/3/0/9/130969259/mifakokez_nonuviv.pdfIn PDF document text
    • http://zekipej.storeyschool.org/uploads/1/3/1/3/131379724/4641148.pdfIn PDF document text
    • http://mevuw.gatewayoflight.com/uploads/1/3/2/6/132681670/2da49cc282258.pdfIn PDF document text
    • http://files.amberlynnphotographyllc.com/uploads/1/3/1/1/131163984/3676630.pdfIn PDF document text
    • http://files.iguanaclothing.com/uploads/1/3/1/4/131437464/nofemevirim.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/1/0485/1934/8386/files/viduxowodojopafobir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1610/0762/files/second_corrupt_bargain_apush.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2718/8890/files/12214238277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/specialized_cells_worksheet_answer_key_pearson.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_off000056a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A3 4696 bytes
SHA-256: 057083987697a3dff0cec0018b164d9a7412930d406efb9d1e944e3f57afae8c
font_01_sfnt_off000066b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 10352 bytes
SHA-256: 50d7dda193f80a813a9cdb02e34d76eb44fd303de96abf472267d23a543af630