Malicious PDF — malware analysis report

Static analysis result for SHA-256 563fba31e2fc98fb…

MALICIOUS

PDF

45.6 KB Created: 2020-11-06 04:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: ede52ed29badff0653bcecee3889fb91 SHA-1: c5a9f2c7c8626e6ecbf3cbe1a8cfc5775e234d6c SHA-256: 563fba31e2fc98fbde58eda41acf9d0ef9b4cd1a3e16deb0238ad2f85defe766
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/aws?keyword=i+feel+statements+worksheet+for+kids In PDF document text
    • https://jonowukamox.weebly.com/uploads/1/3/4/3/134372820/deda4d2a90.pdfIn PDF document text
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/3101054.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/4388198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f8c65d1c4997.pdfIn PDF document text
    • https://xeponadutowa.weebly.com/uploads/1/3/4/6/134612209/satobakumabed.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/kupovapifin-duduxufir-sadedowusi.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/371f5db99b07.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/nuloperapezudurudi.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/pifagexonaz.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/assertividade_no_trabalho.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tikiduwogopejewaxujobisu.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_off00007364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7364 5240 bytes
SHA-256: 26c34b9eb39b27ed20cf8f007059b0e62c6fcd9c170b18fe4c5ca5bd9b8fc0bb
font_01_sfnt_off0000851d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851D 10796 bytes
SHA-256: 68ed617de07bab4090313e0a0bb97fa2468b7e5fa3b0b099416f8088ae44be6f

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