Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1be718c203a4e23…

MALICIOUS

PDF

56.1 KB Created: 2020-11-06 13:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 53378b0364c4a97a33da063d602865c3 SHA-1: 5932a827f22e65e1c6fdc4bf1df06a6bbaa66273 SHA-256: f1be718c203a4e239eebf3112916a661174267d9e09a77f28f97882120644400
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=bulk+tannerite+for+sale+50+pounds In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fa4c5a5b9885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5f9cb26f10591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f87bdc366fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5f9b9bf97949e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5f91be6076ef5.pdfIn PDF document text
    • https://sudewivozuv.weebly.com/uploads/1/3/2/3/132303071/c6959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5f9f6f7c4020f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5f8db37b3b962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f920507cb8d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5f97f1d261ddc.pdfIn PDF document text
    • https://negoladudovas.weebly.com/uploads/1/3/4/4/134456372/sativo.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/016fd536-c5cc-47eb-acef-16c28d96e2b9/liniko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0e6886-826b-445e-b69b-a449b129bc08/59972942686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73026d2-5c29-4860-b71d-e719ba25e430/latev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743f2f9f-e1a6-49dc-8b8a-dacd2310cf54/63371506709.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_off00009a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A13 5416 bytes
SHA-256: 1450a5e7bf98518ef5939cc581392836c48435e6adf5d1e29194c4104211d8d3
font_01_sfnt_off0000ac95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC95 11228 bytes
SHA-256: ca331ec32ea9faaf00944e6b5ce3cecd4f078a2831e099fc083e71e603fdd3f1

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