Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f84e25ea7b3a57e…

MALICIOUS

PDF

46.6 KB Created: 2020-10-30 08:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 4d8cb45c0aeced2d3e794ee28d55ef70 SHA-1: 995db3d394f777725b621c47632cbd987ef79f10 SHA-256: 0f84e25ea7b3a57e224774dae48ff6333da469bf1d5c0444f2afb3354c8e3eb3
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://ttraff.me/123?keyword=ana+diet+plan In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f8f85ed86036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f8bcdc60408a.pdfIn PDF document text
    • https://viziwebaf.weebly.com/uploads/1/3/3/9/133999863/suzulivigaxovuruvub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f8c0e98658a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_5f9b299fce070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f892ed9d6633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f8911a9434c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f891c2156bf5.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/zobiketur.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/podop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_5f929e8dd9d53.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 4344 bytes
SHA-256: 2dca2e40a5a89278db2ac193e208b9b1c1ba3af217b9cefcf0c0daed367c2d2e
font_01_sfnt_off00007cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 10348 bytes
SHA-256: d4c6343af9574ac7b7ea653c5c04e00aed6a09a9b2cc047ab46ff1b5dadefcbb
font_02_sfnt_off0000a009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA009 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333