Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1c17f0b61eb3fc…

MALICIOUS

PDF

44.1 KB Created: 2020-11-08 15:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f4aed80b4faf9500fdced9523975488a SHA-1: 50be2251787fee1f536556d0c925e6f82bb0e1cf SHA-256: 5f1c17f0b61eb3fcca6fecefb2c70727ea2733a06ac1c724a76fe49ad04e24ac
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://traffking.ru/123?keyword=word+that+starts+with+or In PDF document text
    • https://xedonafu.weebly.com/uploads/1/3/4/4/134486379/putixifol-woxevetefowu-favisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5f9c57d656eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f8fb6c657e6b.pdfIn PDF document text
    • https://nonililuwadev.weebly.com/uploads/1/3/4/3/134354571/mivafikifoxifa.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/fexizidumod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://raxusurer.files.wordpress.com/2020/11/identifying_emotions_activities_for_adults.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/gauhati_university_bsc_physics_syllabus_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3403af7d-409f-4df4-b05d-c0b7370b7fd3/cinderella_ii_dreams_come_true_2002_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ab5106-f524-4035-bb7b-6bee2f98c3e3/8932395614.pdfIn PDF document text
    • https://zonujivuvek.files.wordpress.com/2020/11/moonwalker_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/lego_batman_games_apk_for_kindle_fire.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_off00006c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C98 4988 bytes
SHA-256: a0146a73707d1a781aa935de52b184d431971be802afcef512dd1b91ece9c58a
font_01_sfnt_off00007d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9A 11652 bytes
SHA-256: 159b52287ec9d958f2d04db4271a9871d91c10b92a34269f0297bcebcabbe982