Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceaf70138a3e6f62…

MALICIOUS

PDF

42.2 KB Created: 2020-11-06 03:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0cef4b5586f36e674177137863edfb83 SHA-1: c6921665e99fc9ba1701f03a26c142890ce4d952 SHA-256: ceaf70138a3e6f621a373ccbb24ca148ab3e7c55370a03211f741e27a0653151
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=bloons+monkey+city+cheat+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5f9b69d5dfde8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406787/normal_5fa46741f26e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f876f0c84a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8bb950e1e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f89dcc2c266a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_5f961577ce608.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/644b531c-67ed-40ae-b34f-d070c968a2cf/wonadamobol.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/jifekawogagidune.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/molten_armor_terraria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a710e7a8-796a-4704-8113-299c54625429/dbt_wise_mind.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/84187652346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4925a8-c2f7-4658-aceb-3df42fab0ff4/jurusolavag.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/formal_business_letter_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfbdc6e-ed0f-4f2b-985c-bd5e79de2201/lakufigijewefuziv.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/20659641584.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_off000065b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 5296 bytes
SHA-256: ee1da2b2438fa3d6cee0a44a055b871cabecc0cc2bf21133fdbfd367e17d37c0
font_01_sfnt_off0000779c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 10584 bytes
SHA-256: 2333367afb8f6a6e6e784dc15b0f2b1da0728a2c7613a7a04951330f17edb3a1