Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45c9b783b6feb1a…

MALICIOUS

PDF

85.2 KB Created: 2021-09-13 05:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 555d297e528d78d85d941163ac6c3bd5 SHA-1: 3865d36ffe4fcdf8889c2f9c0a9b31b669385981 SHA-256: f45c9b783b6feb1ab1f5048193179fb13d376cc6a0aed73f4f3c85c7b346b13f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://greenlivinggarden.com/htdocs/UserFiles/file/23346770154.pdf In PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/27020408255.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/4219146231.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/41873018089.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161331d70abdff---luxoxikevuvadosajajalam.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/vizuluxefogebu.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c79fb87daf88dc11bd1b07bce4e8b9c8/semiwasa.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/82730061844.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/53575521899.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/72024938259.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/dixomexifapewaniretixod.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613708d126b36---duzolekawupeledu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/dp8ro76v0ka9daaufqud0b55v2/saxumofenigemadur.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/22886170764.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/dipakipa.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/xupizalojaguwid.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/48337675452.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/46483996206.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/14580613625.pdfIn PDF document text
    • http://pedraferro.com/files/files/minudepetopog.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/damumowajalugaje.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/39934182787.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/43663182874.pdfIn PDF document text
    • https://network-italia.it/file/gezuxatopexipodofowefanag.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/kawev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+do+i+stop+notifications+on+my+android+phonePDF 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_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 11028 bytes
SHA-256: 0854faa82b7f28820d6c500afc382fffa7cc7c5b8f22136796f35fe38f94d7c9
font_02_sfnt_off000117ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EA 18288 bytes
SHA-256: 266513e3fa7751f8de405d64bf77cce135a48af01dfb9c8ae53bd2bb0859e651

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