Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc5edfb926df28a…

MALICIOUS

PDF

72.2 KB Created: 2021-02-02 04:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 624482e5ebc1d418e70bd7b65451d8f4 SHA-1: d629375437bdcfdb350fb78ffd028681eb8a948d SHA-256: adc5edfb926df28a44c2c259258197b1d876025b2030b7714f12ec38b1b1d5b9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=identity+vs.+role+confusion+in+the+classroom PDF link annotation
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/7a00b8142fd002d.pdfIn PDF document text
    • http://classkaod.ru/whatsapp_gb_delta_anti_blokiroh7ud.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/fusepibodi.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/ijdVldL/75311652848.pdfIn PDF document text
    • http://questotzvezd.space/1797932379130wca.pdfIn PDF document text
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/fodupo-kexixuxoso-wemapiwazugig.pdfIn PDF document text
    • http://henrysavbr.site/31511359935pbnj.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/joviwuguzumipev.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/2D3OMQM/10969583989.pdfIn PDF document text
    • https://soranetibipuve.weebly.com/uploads/1/3/0/7/130738631/gapiba.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/15105638974klcfe.pdfIn PDF document text
    • http://yourbigdick.space/open_locked_laptop_without_passwordg1i7a.pdfIn PDF document text
    • http://stopnutristrike.ru/lyrics_video_status_download_punjabi_sharechatz3pi9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fezenur/burnt_offerings.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/pigewejakena.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_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 5392 bytes
SHA-256: af5824be71052269af5108f25fc48f46edbf1c07686616c58e8e132459632141
font_01_sfnt_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 9964 bytes
SHA-256: 73be0bebf55e7da385778cb8e205abd181eb3975fb4963b0d5295b4fa0b54447