Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6675a43a261f65…

MALICIOUS

PDF

42.7 KB Created: 2020-10-13 07:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3da9141bce77560dc01e3481859e33e0 SHA-1: eec3cb962be4e4833588eef6ec6a155ace122ccc SHA-256: 8a6675a43a261f65c37142c6e20fd6d453f21b3c9445c3007dfc3e36af1c7a8f
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=beanie+knitting+pattern+pdf In PDF document text
    • http://tejarasa.offlinecrypto.us/uploads/1/3/0/7/130739986/vijodigafixagis_kenuda_fibali.pdfIn PDF document text
    • http://files.mindfuljourney4health.com/uploads/1/3/2/7/132740288/de55ee3f97ea.pdfIn PDF document text
    • http://negagu.genpromotion.nl/uploads/1/3/0/7/130740117/600100221f.pdfIn PDF document text
    • http://lodurol.nsmforwellness.com/uploads/1/3/0/7/130739001/tosaw-lovesowizide-borujaduto.pdfIn PDF document text
    • http://tufojera.rearviewthis.com/uploads/1/3/2/6/132682646/2928708cf3e.pdfIn PDF document text
    • http://files.primitiveart.online/uploads/1/3/2/7/132740724/vitiwufiroku.pdfIn PDF document text
    • http://jisuw.travelingdoves.com/uploads/1/3/0/8/130814575/4812221.pdfIn PDF document text
    • https://site-1039127.mozfiles.com/files/1039127/funuwajivajefufiduxik.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/22165495956.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/85561011787.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/2393138b-1707-4d1c-b648-7c2ed4ff9d2a/62853718040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bf45ea-669c-4bae-a9a5-3bc71c76fa8e/wanelosegoviviwemaliweja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04569e5f-9f2e-4da6-83df-038a0edf39ed/9801758502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56741b7-25c8-4fa8-892d-d57fb4083e4e/9440464614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe494bd-670f-406c-8195-60db8ecba60a/28340510554.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_off00006980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 5112 bytes
SHA-256: 6966fd25212852e559e1f346214e61ec66de0e152fc0d908ebc9bafb12bc4576
font_01_sfnt_off00007af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 10108 bytes
SHA-256: ee78e346a481c1ec7744439e12b7d0dcd049589d38c9583aaa47c1b4ac8b4d5d

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