Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd350eae825c22c…

MALICIOUS

PDF

43.0 KB Created: 2020-11-08 21:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 7f987a1c3dc83eaebe0b4ddccf6cc7c3 SHA-1: b615101bb393d38024b44415b866d7656d6f4cca SHA-256: 5fd350eae825c22cade7814948f42ec2fd41d9e9bdc60e1035d9696d528a945b
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://traffking.ru/aws?keyword=conceptual+chemistry+5th+edition+pdf In PDF document text
    • https://xinufagepowe.weebly.com/uploads/1/3/4/4/134437511/sepekugozura_xitagidari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8961219200a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8ca3e87f73b.pdfIn PDF document text
    • https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/xufoxudogolir.pdfIn PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/vakuvovopu_sixon.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/0b15cce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://poxebel.files.wordpress.com/2020/11/sutipabupo.pdfIn PDF document text
    • https://xikirezeso.files.wordpress.com/2020/11/78046205917.pdfIn PDF document text
    • https://pomutap.files.wordpress.com/2020/11/paduriru.pdfIn PDF document text
    • https://tonefiko.files.wordpress.com/2020/11/minecraft_14._0_android_oyun_club_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/piliwat.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_off00006611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 5524 bytes
SHA-256: e4639027ab8f24cbddaa43ba9ee32634e7e92f242776bf56ff4adb69df80552e
font_01_sfnt_off000078b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B3 11416 bytes
SHA-256: 9a6b0655b8c39d66344e4a09aa08966720cd6074d28582d467a513a468b915bd