Malicious PDF — malware analysis report

Static analysis result for SHA-256 01432f6410ac882a…

MALICIOUS

PDF

73.1 KB Created: 2021-09-29 09:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e35cdf5f4b70aaa27cc98407f764ecd5 SHA-1: 67f608deb9aef2676987d98058a3c991957eeb1d SHA-256: 01432f6410ac882a0ae506b827e093c74ac04d10763b6178dbb774b1230a93c4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JS and numerous links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9c894257eeae208ec3109c52240dcb6e/60181181610.pdf In PDF document text
    • http://sayarbobinaj.com/file/zajejejuluke.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/21999227730.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/tegerixami.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138687ab0f5a---vevalubikuwaw.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/94706076a22d4095c230e60fb668adfb/32268505215.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/texaludisugunel.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/30530744734.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b056113e1e---puxutogaterujuru.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/kuxebovisisofimukozabuku.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/kutelagaramir.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d888b7b712bd678dc25dd3d723be70c6/vatibexurupujiwupalaxo.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/jowumaxazame.pdfIn PDF document text
    • http://fitviewer.biz/files/file/varewatozowujopexozitij.pdfIn PDF document text
    • https://bloomeng.com/uploads/5709287598.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/netefobozuro.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/dobevorelezez.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/32680428951.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/rujogageremebalebuk.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/47869265947.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613514fe49b5c---dezoxonij.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614908513ac8e---fifonilixibifutoxof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=puppet+soccer+2014+hackPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C5 10796 bytes
SHA-256: 00da694dca0c9e855371a3441fd5100ed7c0095f8a6f96c8a55b13fd724e6106
font_01_sfnt_off0000cef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF3 18212 bytes
SHA-256: 8390eeb492503a6c5e272ea71d42fe8490fc7a7404d4d5e954569decfa38af73
font_02_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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