Malicious PDF — malware analysis report

Static analysis result for SHA-256 832ce594b0b25951…

MALICIOUS

PDF

89.7 KB Created: 2021-09-10 10:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b90c9735acc82d8861bebd563b10f0a8 SHA-1: 06aa88cdbd6bf9d7881579e5e6b958f9d63b1704 SHA-256: 832ce594b0b2595176d88556991d8fd287636e754a222204508d184cc0be8a7f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 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 http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138575b600ae---15807819101.pdf In PDF document text
    • https://parisnordmedical.fr/docs/file/mubazewuwanizurizexase.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/zemulexeniwikonexoxigudom.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109080248335229.pdfIn PDF document text
    • http://vhktn.at/images/content/files/tovono.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/jelojolunusowufu.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/47033426902.pdfIn PDF document text
    • https://euchebnici.com/img/file/6604066942.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/garurij.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/65324990518.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/rotoxiri.pdfIn PDF document text
    • http://zimmerei-possert.at/98852829915.pdfIn PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/kixafudamo.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/bazexorudozopeki.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/dowenirob.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/fuxalevurefobozet.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/gezefu.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/tozubonikiveg.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/mibetutisipotej.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/b08a43a7a6b9037fc3b4413bd8e273c7/70581840516.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/83727332418.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/95681281090.pdfIn PDF document text
    • http://stl-hk.net/userfiles/xabinawudegekibib.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/tudol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=darling+in+the+franxx+manga+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AC 10760 bytes
SHA-256: 7db51530aea9faa6f134a3e2fe1399fbda8453d71939872cbcb1e1b77997d1ca
font_02_sfnt_off000128f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F3 18348 bytes
SHA-256: a27952c56792680576eb2e6ce46745b2b7e66ec3332e2a6069a98bcc0e989eef

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