Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fcff2f9df9316c…

MALICIOUS

PDF

76.1 KB Created: 2021-02-14 20:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6159176fa0ae93fee5ee3d7766c895d4 SHA-1: 58fb95f7d0111df7d3069b8549103b98ce4b2433 SHA-256: c5fcff2f9df9316c6d87ecee78dd884147e135e68fab6ad8e9b444f6b0b27153
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/123?utm_term=classroom+discipline+chart PDF link annotation
    • http://gibejujefuguxax.22web.org/paxoxokimujus.pdfIn PDF document text
    • http://reassurez-moi-fr.info/do_re_mi_lyrics_sound_of_music7c019.pdfIn PDF document text
    • http://segepivo.22web.org/hot_rolled_vs_cold_rolled_steel_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_60115176ba82f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393041/normal_5fcd59eda32ee.pdfIn PDF document text
    • http://harkateine.fun/24949500272604cv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_6028ad9f78c7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484820/normal_5ffd1f4ad43ef.pdfIn PDF document text
    • http://vsspb.ru/fovelogitesavivuo4kiu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_6015ef668c123.pdfIn PDF document text
    • https://daxosunusopudom.weebly.com/uploads/1/3/4/5/134510034/xusunatikajoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5fd9491820a22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakafemapekumu.epizy.com/coliform_test_in_food.pdfIn PDF document text
    • http://rivowotow.epizy.com/kindle_books_free_pirate.pdfIn PDF document text
    • http://gudoxigamodire.rf.gd/facebook_for_pc_windows.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_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 5220 bytes
SHA-256: 34b5f6a6660bfd18f836d9513800b6042dfb512c6651ec6dbb0c499c35b27cd1
font_01_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 10340 bytes
SHA-256: 89209db0aa5f6882875a29ac423904ead3e6297bc5535587707f1eaba0bc71a3