Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f9d19f455eb5d5…

MALICIOUS

PDF

45.2 KB Created: 2020-11-05 20:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ce7b1e8166e5882274030474202c25d2 SHA-1: ca42c92d83543daa7e5ba1a20987123e90cfbfe6 SHA-256: e4f9d19f455eb5d556e2361f5923a04c568c0dd23d5b35b6a4564870aee34c87
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://traffking.ru/123?keyword=the+13+goals+of+a+witch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f946cdf4d735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f90f4a04dbd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5f9c90008924f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_5f9b8bb2de589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5f9a86f57ab31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5f8a02928aa3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f906f26be909.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/dedinavesute/deus_ex_mods_for_first_playthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/luzelopufabopamavaketizax.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/calendario_laboral_2020_catalunya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6957/7624/files/the_plant_paradox_cookbook_100_delicious_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/99651425200.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/acanthophora_muscoides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9672807-6131-422d-871d-34d503215dee/wadosodekojo.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_off0000719b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719B 5304 bytes
SHA-256: c5aec6d2f0c90a5fe3d70ba259a11ccd16e70d1b94e7eeb8fe7fcbb48a5b937c
font_01_sfnt_off000083cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CC 10764 bytes
SHA-256: 9f758c049e5b502f438f70363eeb2bf8603dfe2774d8564fa94f1656dfa32783