Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c89ab35b5b2f954…

MALICIOUS

PDF

41.0 KB Created: 2020-10-07 23:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fa244ea30819b2e47b1678c506653752 SHA-1: b1a0c78348b1039ba3215cb3aec5d1d54df90ba0 SHA-256: 7c89ab35b5b2f9544d9808c852dbcd176da175bc93ac663bb124e29f91ac9339
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://ggtraff.ru/strik?keyword=lifetime+guest+pass+form+pdf In PDF document text
    • https://site-1037906.mozfiles.com/files/1037906/15795428299.pdfIn PDF document text
    • https://site-1037849.mozfiles.com/files/1037849/39162439881.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/43744824317.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/xikatonazedexup.pdfIn PDF document text
    • http://files.everyotherthursdaypodcast.com/uploads/1/3/1/6/131606405/6282646.pdfIn PDF document text
    • http://tilow.ranchnomade.com/uploads/1/3/0/7/130775447/kazod.pdfIn PDF document text
    • http://biwoxariv.mhes-ses-bandstrings.com/uploads/1/3/0/7/130776132/83f9b973bfd75e6.pdfIn PDF document text
    • http://jegakares.burgandysings.com/uploads/1/3/1/1/131164173/b060f.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/931739fd-5da2-4245-ac99-38843222cfdd/57502344721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3536bedb-cf65-49cc-857d-2e79260a77ee/57910414329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634cb643-32aa-4525-9de3-b996517005dc/18687055396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fef59fb-3336-40b7-84bb-59b2d27a4d35/ratoraferejegajaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0bef68-0bd9-4404-8cce-ded99f1be0df/53719004070.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_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 5272 bytes
SHA-256: c7f0c4700e001d783ff725919c24622ede69a9381835f4349d9628bffa7e7278
font_01_sfnt_off00007475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 10208 bytes
SHA-256: d7ceb127e6067dcb93b3f213d923104d357c82083a1e045addd01b49369dbec2