Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9165b9c1e75dc59…

MALICIOUS

PDF

44.8 KB Created: 2020-10-12 13:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 926d32a0080bf67b616bf35ab2058a30 SHA-1: 668c5b4ee5f78094462d1dce01fbd9129ba12ec8 SHA-256: b9165b9c1e75dc59e7bb144c3c378cc815018cbc0aab9bfb480f6764fa8c8b8a
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.ru/pify?keyword=kalphite+queen+guide+runescape In PDF document text
    • http://files.ourroyalcommunity.com/uploads/1/3/0/7/130739026/suzoguzirebe.pdfIn PDF document text
    • http://files.sunflowergenetics.com/uploads/1/3/1/1/131164128/dobujetoto_bokawijoguteze.pdfIn PDF document text
    • http://files.mytechiebuddy.com/uploads/1/3/2/7/132741475/zobebusami_sasul_patevade_piwadegawunexo.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/9d01b75e-d49d-4682-b59b-8c7190b5aabf/fopesudetepunugonevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66278da6-1e01-489e-8511-90e58967d03f/judaketigul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a34590-a58b-4d2f-8ba4-08d491a3d9ac/gosuderalokusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb06c33-be83-4eb6-b557-e514fb35c14b/68853697615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b39d065-738b-45ed-a603-51e5c38a3587/42778418596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f750e1-3a91-4403-a495-ddca775596a7/mogiwef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7423b6-9f62-46e4-8294-29737c44accd/20542805681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c61bb5-4151-49c1-9e00-375e578567da/18106607857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7619c4ad-f511-428d-9dea-47beb07680e3/xagejiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e370ae61-761b-4ccc-84c2-1cc00cae4a77/domuletalokulubujeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d04302a-2bbd-4745-b4d7-1a90507ee85e/77045332284.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_off00007096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 5432 bytes
SHA-256: ce9d67b7b4430432d907d2022f5fbffae84b7579b43af8097321989548924d1c
font_01_sfnt_off000082f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 10284 bytes
SHA-256: b1857c592af78d2bf3533f760922372e3d2e27a1ef721da00ddc5cfd3dc7a5d2

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