Malicious PDF — malware analysis report

Static analysis result for SHA-256 b036defc5560a15d…

MALICIOUS

PDF

41.6 KB Created: 2020-10-04 05:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fa36320842cfafbc911faa87f504f338 SHA-1: 0a17a28327a23809f3003f7dafaa57e0b0129a79 SHA-256: b036defc5560a15d855b77a9fdc64a62df3f5783e183cc3d764f950c923f6e0a
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/strik?keyword=3.55+ps3+jailbreak In PDF document text
    • https://site-1039431.mozfiles.com/files/1039431/zefamu.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/40496639714.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/17102990442.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/xodugitox.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/fokabatojifim.pdfIn PDF document text
    • https://site-1043160.mozfiles.com/files/1043160/9161012264.pdfIn PDF document text
    • http://bupex.animabfitness.com/uploads/1/3/0/7/130776644/276138.pdfIn PDF document text
    • http://fomodumo.carbonprecision.com/uploads/1/3/1/4/131406841/bujibosipepe-pumoj.pdfIn PDF document text
    • http://files.themicrofarmproject.com/uploads/1/3/1/4/131452958/7256987.pdfIn PDF document text
    • http://files.ohswolverinechoirs.com/uploads/1/3/0/8/130814769/7965898.pdfIn PDF document text
    • http://wobod.mrsjonescoldbrew.com/uploads/1/3/1/4/131438500/jukoba_xelodorotabim_zegoxeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000649e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 5320 bytes
SHA-256: da8eb974c1ae2b0566a79d6e65e380977fd224e793c4ffe809e278c996a35144
font_01_sfnt_off000076c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 10292 bytes
SHA-256: 0ecaaddcbb84b02fc967d5add4e27386731f2c6fd6031c7a1689e519e528fbe3