Malicious PDF — malware analysis report

Static analysis result for SHA-256 39292c8c3474a00c…

MALICIOUS

PDF

45.3 KB Created: 2020-10-14 22:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3927ac4e19e22acef0a7ec0916094c28 SHA-1: 60bd8cdd969fbe95113acb1cc1f78df6bf2191a8 SHA-256: 39292c8c3474a00ce949f259557e40afe92df9dc90878476386e1d730756c4bf
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/123?keyword=inverses+of+logarithms+worksheet In PDF document text
    • https://site-1048491.mozfiles.com/files/1048491/migar.pdfIn PDF document text
    • https://site-1037821.mozfiles.com/files/1037821/21329798621.pdfIn PDF document text
    • https://site-1041184.mozfiles.com/files/1041184/fabag.pdfIn PDF document text
    • https://site-1043882.mozfiles.com/files/1043882/6204060625.pdfIn PDF document text
    • https://site-1043098.mozfiles.com/files/1043098/28003650464.pdfIn PDF document text
    • https://site-1042501.mozfiles.com/files/1042501/davob.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/71285141565.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/1119025907.pdfIn PDF document text
    • https://site-1039602.mozfiles.com/files/1039602/6592880953.pdfIn PDF document text
    • https://site-1044503.mozfiles.com/files/1044503/25514926315.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/83400401351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f871f7cd2d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f871450365cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87083de41f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8706dc60a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8728297c168.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/efd4c573-486e-4334-a181-39a1c847d8da/pasodosaxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1f376b-6715-4f19-bc5e-67e48fb3bb8f/zerejetovafuluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6ec546-a2fe-4a1f-9462-1c735d8db0ff/lovufuvaxilosevot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14bb2c4-d643-4fe7-9830-f5c8f7702fa2/tisavojexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa65c226-1d0b-433d-827e-58c940170b3d/65643838862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4470599-cb28-405c-a5f8-701ba15ef9e2/4172550342.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_off0000722c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722C 5332 bytes
SHA-256: eacebdfa56bc363ceab67005c2b09495c55709bc1cf9a87ba11602f636d9b2ad
font_01_sfnt_off0000843a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 10280 bytes
SHA-256: a8bf42072ea3cedca1f16c7f8785e5322df8d0251813523f8ad61ac886faf033

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