Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce048d411d811a0…

MALICIOUS

PDF

44.9 KB Created: 2020-11-01 14:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 235bc40be177c39d21db803cc4467822 SHA-1: 002d2680bd4f512499fe7ee9f15bb0dcaadc2cf6 SHA-256: 8ce048d411d811a02afe022629e2fbde7553823f502e99dc90bde7eef2174dd1
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://ggtraff.ru/aws?keyword=pirelli+calendar+2011 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f9ba6e26d7a4.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/0b6bab88-9689-4c89-b31e-f77c468a33a3/5148828163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9849/8981/files/lolelebato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3c9638-fc5d-424c-8ecf-5e929ffbcc1a/momif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5281/2456/files/7508885580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa80faf3-5960-477b-a5c5-bc974aec7049/xisagikilak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7732/9586/files/coding_guidelines_for_inpatient_rehabilitation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9578/0245/files/jitizuwonavuzaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1856c19f-0ea5-4c1a-ab11-619dd3e9d80d/philippine_history_book_zaide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3170/8072/files/57987491153.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B94 5084 bytes
SHA-256: 9aaf2d8d75eee3e4e2109158ec669731783d8d5cbbd36c9542384d3db7b2f850
font_01_sfnt_off00006ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEB 10812 bytes
SHA-256: 04fcfb17c1a160eb38b20344b3c35c1828df55d8871250b141bba90031f0cff5
font_02_sfnt_off000091e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E6 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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