Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a2ba8563a19846…

MALICIOUS

PDF

58.1 KB Created: 2021-09-23 04:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c2a8993a0e47d5a9fe65bb4d784c64ed SHA-1: e6578d58e53c66d8692d0519aa1b4fc53d2a49a8 SHA-256: 00a2ba8563a19846d57600207104331bbbbef355abc9fcc86d280214225d9ce6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the conclusion that this PDF is part of a campaign to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8760

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://cructi.ru/uplcv?utm_term=lightroom+apk+for+pc+windows+7 PDF link annotation
    • https://groupekheidri.com/ckfinder/userfiles/files/kakesiwododixigajawo.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94819380702.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/50267193501.pdfIn PDF document text
    • https://italvaping.com/file/84692969429.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/zemevuxivele.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/15578462239.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/moxamutiretizid.pdfIn PDF document text
    • http://cga82.com/admin/File/witafubi.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/vezanuga.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/ij3mic4b6mpo7a7dd1fkqc5hv8/sigabuzu.pdfIn PDF document text
    • http://zamgph.com/uploads/file/032201309021.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614720adc0ef6---zikujewubosojazuvi.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/upload/file/jaxisaromuxidab.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161445f976a6ba---26171814467.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614635ed741d5---nafononukokajepewinivod.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/bixutetevupijakaxopatu.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109091351047260.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/19284837736.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/dovewav.pdfIn PDF document text
    • http://carbontuning.ru/file/zezunerejidunut.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/pifanewifog.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/dowotod.pdfIn PDF document text
    • 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_off0000cf23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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