Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6f9860ca6f05a3…

MALICIOUS

PDF

65.0 KB Created: 2021-09-09 06:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 09dcea77339644e2a99b3bb3216e8451 SHA-1: 7f12f5c3afc0c3a68ddc0398f656e25ed06f846f SHA-256: dd6f9860ca6f05a38f01004f6a808a3b003068c702e0dbe91beb4808377f9779
154 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7803

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://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/50201411017.pdf In PDF document text
    • http://hoavily.com/uploads/files/dijujutobi.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/64209177893.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/14025922534.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/tovanamixenamuvepo.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/ligosesubixonawimuw.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/69e0e9bc3af0e0f62cc587de2c2b0da6/14721742537.pdfIn PDF document text
    • http://efeotokiralama.com/Upload/file/fawadi.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/29970348087.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/xanavojudibakawezipima.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/vefijofilenufokesevo.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6f3ecc9c9638626be2d1a86c3f639019/wexuvikuzuwatatinudoge.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/49959025667.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613507a13c1c0---vitabibowufar.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/46124997455.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/popovu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/sq5dmepve1blv67e224u9g6li6/84167032279.pdfIn PDF document text
    • http://hexindechem.com/upload/files/pizogedab.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/21823028836.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/lesifavijumunezosewudud.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/xidinulumutumaligexur.pdfIn PDF document text
    • http://shahgrp.com/uploads/fovuxoneniwutozamegimute.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=3+letter+words+beginning+with+rPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 17544 bytes
SHA-256: c93eb6601b8acdbb6801d59a536f60ee64115328fc9c980abf2760293a0497d4

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