Malicious PDF — malware analysis report

Static analysis result for SHA-256 8978c8786b3cfbcc…

MALICIOUS

PDF

36.9 KB Created: 2020-10-05 09:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ea33380c74a8aa709225009adf68aed0 SHA-1: 9f03b35468080297898d057e6c9e4aeb94206bf7 SHA-256: 8978c8786b3cfbcc561816a4d87e3a624ad363ac781422f55daed09a570d1910
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.link/pify?keyword=giant+soul+sorcerer+5e+reddit In PDF document text
    • http://files.casewayproducts.com/uploads/1/3/1/3/131397997/4722c.pdfIn PDF document text
    • http://dobune.ahacroatian.com/uploads/1/3/0/8/130814328/2580248.pdfIn PDF document text
    • http://files.winreducer.net/uploads/1/3/0/8/130814674/xokomezabuw_puxinomikexa_rabiligu.pdfIn PDF document text
    • http://tifad.hootandhollerpr.com/uploads/1/3/1/1/131164067/8031993.pdfIn PDF document text
    • http://lurate.rorysugruesaddlery.com/uploads/1/3/2/3/132302846/fccd7e1ea92.pdfIn PDF document text
    • http://files.apexmiddleschoolpta.com/uploads/1/3/0/7/130775683/sixolinuderawo-pekafege-reniwit.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/6033e28a-7fb9-46f7-82ea-9e481873b860/jabuvitutipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/309fbbc0-0430-46f7-a9f2-6596e72c4d28/woxuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbfb8531-7897-454c-bb58-b0061f84a029/58262142684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3841d493-454c-4ca5-b0c8-b4442b83d11a/33103705109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857cedd1-7bb9-4f54-a73b-2c4850413d08/falaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105f3d16-7a7c-4869-b417-c12a64ccb7c5/jodujokezikirubidusagiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef0a782-0f69-449d-9cbe-21dd08a26ca4/kakeketekenewe.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_off000052c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C5 5088 bytes
SHA-256: d09741b28059f1ed595c890090b6f3c1ed960a30d46badf22d534a434b616ed2
font_01_sfnt_off00006425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 10392 bytes
SHA-256: 6c0620fa88dbf2c6d7f44ec678b5ecdf90e9ae83d0674eecab909051771352e0

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