Malicious PDF — malware analysis report

Static analysis result for SHA-256 c218880ec5716339…

MALICIOUS

PDF

78.8 KB Created: 2021-05-20 23:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b7357237d8a6248dbafd7092305fb4dd SHA-1: c5fed9a3ddff7334a44190109702a402eb77f994 SHA-256: c218880ec57163393945e4980a8b6faa52bb509adb1fa49d2b5d5d4473440317
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a significant number pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The presence of a critical heuristic for PDF_SEO_LINK_FARM and ClamAV detection as Pdf.Phishing.Trojan indicates a malicious intent to direct users to potentially harmful content. While no scripts were explicitly extracted, the structure and heuristics point towards a phishing or scam attempt leveraging external URLs.

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
  • 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.
  • 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://soxebez.ru/strik?utm_term=how+to+terminate+a+lease+in+florida PDF link annotation
    • https://nuranisemamev.weebly.com/uploads/1/3/5/3/135324344/1e483c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454811/normal_605c6cb6f27ce.pdfIn PDF document text
    • https://motadonikedubi.weebly.com/uploads/1/3/1/8/131856170/dulomolid.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/170d94a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_6067cda9388c4.pdfIn PDF document text
    • https://zuvopejibi.weebly.com/uploads/1/3/4/0/134017525/0d111b.pdfIn PDF document text
    • https://sisexalixigana.weebly.com/uploads/1/3/5/3/135323773/mumovonefirumaw.pdfIn PDF document text
    • https://mokaleje.weebly.com/uploads/1/3/4/7/134732408/pekedexipulabawole.pdfIn PDF document text
    • https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/valula_maxanigidefi_mubugez.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/5a881408-c533-4030-b313-8f1fe6b35926/bejesetudemo.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/hunter_x_hunter_wallpaper_para_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4781040-0e68-4619-95e5-79e07afb7ac4/maytag_bravos_washer_fault_code_f51.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/72302376860.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/keluwakaxat.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/indian_express_epaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bb9088-0c82-4057-b6ba-3d1ee0d848a2/cuisinart_elemental_11-cup_food_processor_in_silver.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_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 5108 bytes
SHA-256: 7c076b4a82613b8038d3951f505c6540437f036a39c1e5fa45feec2cf1080a10
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 10456 bytes
SHA-256: b0f028282dd346a8ccaa5c19ae1409b2b114acfbe98829cb655424eef3966cd0

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