Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f13b3601c86cab7…

MALICIOUS

PDF

50.0 KB Created: 2020-10-06 23:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: eb0e6baea0b46d7e53c070a0125f91ab SHA-1: 4f89416f4cf6f71f3803e0c835fd2f572aa24d72 SHA-256: 4f13b3601c86cab792cf1ca5ea9123ce0a01e39b0402e78819fb369ed1f1c43d
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://cctraff.ru/strik?keyword=sigsma.carabineros+de+chile.cl In PDF document text
    • http://files.nurseshantania.com/uploads/1/3/1/4/131452922/karefowitiwub.pdfIn PDF document text
    • http://files.realappealhome.com/uploads/1/3/2/7/132710589/9351623.pdfIn PDF document text
    • http://jokama.kstechtwins.com/uploads/1/3/1/3/131379326/4316c2aedb.pdfIn PDF document text
    • http://ravorila.tomheadphoto.com/uploads/1/3/2/6/132681352/pusevifiloxozazu.pdfIn PDF document text
    • http://pizugix.pirouettesschoolofballet.com/uploads/1/3/2/8/132814930/vovaxowovepapofifofe.pdfIn PDF document text
    • http://files.kellyharkinsdesigns.com/uploads/1/3/2/8/132815359/josaf_sufam_wutumigil_jonekijad.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/36656280572.pdfIn PDF document text
    • https://site-1036805.mozfiles.com/files/1036805/fiketonerutivirofo.pdfIn PDF document text
    • https://site-1038402.mozfiles.com/files/1038402/migufuxanokenuveneka.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/c2faa681-e8a3-4db4-9357-d4e3a2025c65/zirikopenakelojodapusedap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a292aba2-9220-4c75-8a8d-002d04398fc3/90866668123.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_off00008645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8645 5628 bytes
SHA-256: fe80825400ad2d9b48942516b03d6c0de43e0c0718ed4da1d55726973b1a2f88
font_01_sfnt_off00009939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9939 10076 bytes
SHA-256: 5c6c57d0fac5c62b6e896997797c9ac6a2ed5382808ae9a06b0521a65d738f54