Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b8de4a65ed46c9…

MALICIOUS

PDF

38.6 KB Created: 2020-11-09 16:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 989b1d9b5310679856f04f3bf4e79562 SHA-1: 0e3606b343fcbf0e3bf0d6934d13e44fe51a0a89 SHA-256: 99b8de4a65ed46c97ec3a8e2aa433e9bde29bf514c74098e2ae1e2bdf3d92293
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://traffine.ru/123?keyword=west+point+elementary+ga In PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/ae05c5ef4.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/xudoranogas_mosavakuka.pdfIn PDF document text
    • https://pedugosiv.weebly.com/uploads/1/3/4/6/134622687/1822577.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/1bf7a66e4791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f990939543b4.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/0b4271.pdfIn PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/2041430.pdfIn PDF document text
    • https://vakumijajuxos.weebly.com/uploads/1/3/4/4/134465568/2477376.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/70a1c3e4-e0df-487b-b0bf-ecda75774254/jokuxobepumavebedimopeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39aa5035-9916-436d-991b-9c5a3be15ee9/wasejokavotufapivunenuxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623bc9ef-00e3-4c9c-ba88-27c3ada1f533/65654377194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c698298-ab7e-4ef1-8fde-a392211ee469/xavokexupojaliviwenitev.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_off000057ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AD 5256 bytes
SHA-256: eec50aeb5422dec2fdb411e11d4420487d8b985fd3262697cc496dd3672d062b
font_01_sfnt_off00006988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6988 10732 bytes
SHA-256: 268269c1a540f61b8ce47dafaec1a0451ad8b23fce3b2eff28574b4e8a393f5a

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