Malicious PDF — malware analysis report

Static analysis result for SHA-256 14519a9204da01a8…

MALICIOUS

PDF

82.4 KB Created: 2021-06-12 16:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4a16fabe8a86fb1bd9b9296e9fe17f83 SHA-1: 2b3bc70c9ab1541c9411f16125a470da371cdecf SHA-256: 14519a9204da01a87f1d0114ae6c4d532fcf62ddd38fa37bd73257d3d4f0cc4a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://coretry.ru/pbw?utm_term=football+shooting+drills+for+9+year+olds PDF link annotation
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/d6eea207357295d.pdfIn PDF document text
    • https://zisuwurelexutik.weebly.com/uploads/1/3/4/6/134668326/bfac02a0655d.pdfIn PDF document text
    • https://delezopo.weebly.com/uploads/1/3/4/6/134600584/jetafisotisidomud.pdfIn PDF document text
    • https://ropidofizo.weebly.com/uploads/1/3/0/7/130738616/retisawet-pisirejaxivufex-tavetinenevupos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_60b8599fd6fec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5ff1786632664.pdfIn PDF document text
    • https://fenivubad.weebly.com/uploads/1/3/4/4/134482284/zapatakawujanuvote.pdfIn PDF document text
    • https://delezebewokumod.weebly.com/uploads/1/3/0/7/130776218/fijugaga.pdfIn PDF document text
    • https://bijejosuti.weebly.com/uploads/1/3/1/6/131637047/6695321.pdfIn PDF document text
    • https://dajemegexiri.weebly.com/uploads/1/3/4/4/134492390/6a7b9e5.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/743aa84.pdfIn PDF document text
    • https://donezuzigomage.weebly.com/uploads/1/3/1/4/131438278/1699458.pdfIn PDF document text
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/vasimexes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_601e04ba41294.pdfIn PDF document text
    • https://gonewama.weebly.com/uploads/1/3/4/0/134095907/vimasorikunevoni.pdfIn PDF document text
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/2489295.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomedaj.pbworks.com/w/file/fetch/144747720/38783353316.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144479718/75023460347.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/f/are_epic_games_free_forever.pdfIn PDF document text
    • http://bolejagum.pbworks.com/f/english_file_intermediate_third_edition_workbook_descargar_gratis.pdfIn PDF document text
    • http://tujedet.pbworks.com/w/file/fetch/144997203/29571526676.pdfIn PDF document text
    • http://funesut.pbworks.com/f/std_10_maths_textbook.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_off00010324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10324 5520 bytes
SHA-256: 2e00d88105013317e03abdd2c49c7fc941ca9c8af40b7fdd94aa780dfcd5a3d4
font_01_sfnt_off000115e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E3 10736 bytes
SHA-256: 9f873a61a382120246f4952e9cc38fb7cd4100422798f074f8382f52b0371393

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