Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5799c01ea71d6ca…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 02:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dff1edc0009a43dd212920845673a2a6 SHA-1: d08d56169e0103279203c71b0ed693f607e16dee SHA-256: b5799c01ea71d6ca3f8b21fbe27f8b7dc857e2575a7664e92b6058d7d823aab5
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to a variety of websites, many of which appear to be compromised or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or download further malware. The structure of the PDF, acting as a link farm, is a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3499

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
  • 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
  • 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://irlanc.ru/uplcv?utm_term=homelite+zip+start+vac+attack+leaf+blower+ut08107+manual PDF link annotation
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/7412271749.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/13069420703.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/4dnc4e6nc76u5uun3pn39ol1r9/mozug.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/ninamamuxufa.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/17478924228.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/28160832251.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833809569c9---gevopugipumusaza.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/xakokufupi.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5dd4023c0---29847468034.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5985e7e44---47194776009.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/68322663226.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/vasimixamusimuzugome.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/lokis.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/tonatofedimunawi.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/8aef0e2add7956019cfa381cf4d77584/92942748145.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/12733424974.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/guligukesogasip.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/lumeso.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0df23450---rezalalopubemuwan.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608014548e735---funenenebijonek.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/zafifonuxof.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f08e88e063---84538531721.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/mozuk.pdfIn PDF document text
    • https://efnnma.org/files/file/joxewonebopibibodu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 18352 bytes
SHA-256: dc225535bd3806259b068e9f7de864e09f80eda16f211fbbda2ad358e301a196
font_01_sfnt_off00013a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1