Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ef48287723c81a…

MALICIOUS

PDF

75.1 KB Created: 2021-09-18 20:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 152e78cc238f4e4c7456af43d65a0430 SHA-1: 23f631cc5e048e15e5786257f57ec76a4b02c691 SHA-256: e0ef48287723c81a6e798ec266de9b3bc0915594dca7d355605c5ab2eb69f07b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple disposable hosting sites, a common tactic for phishing and malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were directly extracted, the structure and heuristics indicate the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3768

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://yey.uw52.com/upload/files/wigizalumuzumumor.pdf In PDF document text
    • http://stroyindustry.com/userfiles/file/86575193163.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/xesexojunasulukifikazad.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/95321677312.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/zeviwusavenijuvaw.pdfIn PDF document text
    • https://bor-diing.com/upload/files/ronasuribogurewawaxadad.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/62355549240.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614045b74782c---31287130993.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/jurebadidefagutewugabimo.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135096c7d132---bitupokujawebogitofow.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/9313859493.pdfIn PDF document text
    • https://t2sc.me/userfiles/nopenurusozinaxiz.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/lirulelorenofujaraz.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/sodotidiweva.pdfIn PDF document text
    • https://gianlucabruno.it/dati/upload/file/63051558308.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/rovoronis.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/27008907017.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/defezufafo.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///loromogijaxulisiziwi.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/zupegodi.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161432b2b64085---guwesija.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/24469380724.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/49358970984.pdfIn PDF document text
    • https://aedwea.com/upload/foto/sumil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+km+player+apkPDF link annotation
    • 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_off0000d2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EE 17600 bytes
SHA-256: cd079c33839fe555ca5e113ec500a285ae924b7b3ae208e8b99796f38aea9279
font_01_sfnt_off0001004c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11863 10488 bytes
SHA-256: 90fc8aac9ac7d366edc3ad00430f6542601fec0be45c0fa5fa97b64e9a6197a4

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