Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd4269bd5961065…

MALICIOUS

PDF

45.4 KB Created: 2020-10-16 05:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dbee5345d3ec216c06f9ce7811fd4788 SHA-1: 5270ede9554ff0f24053800de1c2f53fe2192b5e SHA-256: 0fd4269bd5961065e0fcc3aaab0f9517a3a99da53c650347b411f5410a34b73c
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://gettraff.ru/123?keyword=musical+ly+en+uptodown+com+android+download In PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/bomovazisobibo.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/265bdd54fd.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/vonenadetijutajefibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f86f8249ad86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f87acfe78f86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f87453ff1179.pdfIn PDF document text
    • https://site-1039604.mozfiles.com/files/1039604/47714959998.pdfIn PDF document text
    • https://site-1043477.mozfiles.com/files/1043477/chapter_one_study_guide_introduction_to_chemistry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f88cc8545a67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f879aa776743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f88be4a8388b.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/causes_of_diabetes_type_2.pdfIn PDF document text
    • https://site-1043043.mozfiles.com/files/1043043/vojivuj.pdfIn PDF document text
    • https://site-1042276.mozfiles.com/files/1042276/64559045574.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/tezisaziduw.pdfIn PDF document text
    • https://site-1048245.mozfiles.com/files/1048245/roblox_avatar_editor_apk.pdfIn PDF document text
    • https://site-1040795.mozfiles.com/files/1040795/13762004212.pdfIn PDF document text
    • https://site-1042451.mozfiles.com/files/1042451/puxidilufikivalitoroxos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 5300 bytes
SHA-256: 320e6d399f7339776c341195529292a19bb94a6c32946c5730f770a030c8fc85
font_01_sfnt_off000075e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E7 10880 bytes
SHA-256: 6364861b436a72b0af6db582de2c7f1e08ec45b44b056f81960d18a0a8408d7e
font_02_sfnt_off00009a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A11 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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