Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da9152feda12ee4…

MALICIOUS

PDF

73.0 KB Created: 2021-02-22 02:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2a766f9311e6eaaeece18db154ba1304 SHA-1: 8ff473faa5fadedb34b96e98b267cd2e1973fe03 SHA-256: 5da9152feda12ee471729d9f791296bcf21a24ac8d317a30fb508f9222840703
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely leveraging a PDF exploit or social engineering.

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://jacksth.ru/strik?utm_term=how+to+reset+maintenance+light+honda+odyssey+2003 PDF link annotation
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/d53588a79.pdfIn PDF document text
    • https://dotijude.weebly.com/uploads/1/3/0/7/130740148/3263660.pdfIn PDF document text
    • https://lukibufipijuzom.weebly.com/uploads/1/3/3/9/133997252/nofuzifa.pdfIn PDF document text
    • http://carluxepaint.site/biostar_x370gtn_manuallncg8.pdfIn PDF document text
    • http://reassurez-moi-fr.info/origin_of_short_storyto51r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_601a86e5d02f3.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/naturopitafewol.pdfIn PDF document text
    • http://justiciaforjustice.com/sabamh4rlc.pdfIn PDF document text
    • https://giponijas.weebly.com/uploads/1/3/1/4/131453823/saveraso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366306/normal_5ff4a543158c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_601db0da47e50.pdfIn PDF document text
    • http://agreevudb.rest/wodizuvokeminisiviliwuxn70qs.pdfIn PDF document text
    • https://zegoliro.weebly.com/uploads/1/3/2/3/132303320/gekejofej-zoduzejomaridu-dupufizozajoniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_6023309165bd0.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/guxonolemodoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_601ca7c4250d7.pdfIn PDF document text
    • https://mepopukivar.weebly.com/uploads/1/3/6/0/136083549/9ebd7.pdfIn PDF document text
    • http://bigwin-1xbet.fun/81514003440c1tz1.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_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 5948 bytes
SHA-256: 2fc7c0858ae567ecf52dcfd24fb0124ead49574615ae033eb35d26b5b25fb7c7
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 10280 bytes
SHA-256: df9b2286780659df42ef9c8bf3beddd5d3c95bdc1d17188be6ef9e77239e7928

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