Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde14120952160d7…

MALICIOUS

PDF

47.4 KB Created: 2020-11-03 21:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c17008b773983eb5ce9a648353200cb1 SHA-1: 57927e5150e2abe30f7a9e0742e3da00a3e51a8d SHA-256: bde14120952160d7cbf853635fab2442aed7aad060cf2a67a1ff5ad3d221cf25
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://gettraff.ru/123?keyword=sirens+of+titan+pdf+free In PDF document text
    • https://zoxuzula.weebly.com/uploads/1/3/4/4/134489613/dojobimokeg_nogejogo_pinesu.pdfIn PDF document text
    • https://taxufizewafodo.weebly.com/uploads/1/3/4/4/134477277/84dbc865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f9b1e4631c5d.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1407642.pdfIn PDF document text
    • https://guserokofetaw.weebly.com/uploads/1/3/4/3/134341966/19f235674.pdfIn PDF document text
    • https://posilopawirina.weebly.com/uploads/1/3/4/3/134353572/211467.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/xanebavifamopez/sezazudoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/que_es_nomos_en_egipto.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/fimemolawojifo.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/21883365468.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_off00007a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A32 5108 bytes
SHA-256: da628c15a97e8f2fc08f5d3a5d6c7f1f612028895b77aeba08d8b300ffb75661
font_01_sfnt_off00008b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9D 10548 bytes
SHA-256: 91da61103747f7dc9e47c889de0de70b30bc5a2263cb1c1f2f7b5e5ecfb2a55c