Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bb2783e37dc42a…

MALICIOUS

PDF

64.5 KB Created: 2021-02-17 19:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 525c175d2504a7fcae81c9a925c8cb18 SHA-1: fb32cf7f32982d4f9a2c744b571901efa306acff SHA-256: 42bb2783e37dc42ae584f31f70b524c36d33b7747395d84d3645bbf53abd360d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wix?keyword=avon+washington+library+indiana In PDF document text
    • https://cdn.sqhk.co/gokarunedod/Eij8hfW/project_planning_tool_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410702/normal_5fc9beac5f198.pdfIn PDF document text
    • https://lofativunami.weebly.com/uploads/1/3/4/5/134581692/wozub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_5fd94c08a0905.pdfIn PDF document text
    • http://spainsale.pro/kangertech_evod_vape_pen_how_to_use56cda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fd1ff759b9e5.pdfIn PDF document text
    • http://doordash.fun/contexto_historico_del_romanticismoivkrz.pdfIn PDF document text
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/zuxekugefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_6028e80d8ccfc.pdfIn PDF document text
    • http://vejefulolite.22web.org/rirokimovix.pdfIn PDF document text
    • https://malilojomatade.weebly.com/uploads/1/3/4/3/134354128/nefasepuxeda_fajazor.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/10708069687v3s97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_60092feaa8416.pdfIn PDF document text
    • http://domainlimax.xyz/graduation_reception_templatesgi22l.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/jjbhbhe/57090022125.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/hdibham/basorobamofubat.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_off0000bfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB8 5468 bytes
SHA-256: 60414cbbf2b647204222f7dbf208aa588e6c80ea32b3b84a0bfa930f66321739
font_01_sfnt_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 10048 bytes
SHA-256: e174f5da5a6ca835036c245cb373e82aca642ba957bce3281fc18abb4efe9249