Malicious PDF — malware analysis report

Static analysis result for SHA-256 9021553959322249…

MALICIOUS

PDF

66.4 KB Created: 2021-08-04 11:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3e50c16f07048d8666f65b1d50e1b558 SHA-1: e9fc2f75abbe06435394ffbf0718fb6349ba8a39 SHA-256: 90215539593222498179462e22914253aca676b31bdfc2db57347f76a6e7cab4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious or phishing websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6559

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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/9fef2643d6d33876aea64e559acce285/domozebonajuxip.pdf In PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8775b41087---7889365353.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/81139840450.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/9969855952.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/47389381591.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160878d2a285be---1682778572.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/78q8gu9m0rejrlcc7m5536aog5/fogabajadeg.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/55798941082.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/1300506722.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/wurimoxelodukejom.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/13293430298.pdfIn PDF document text
    • http://porpora.eu/imagenes/imagenes_contenidos///mupaxepukawat.pdfIn PDF document text
    • https://vientangluc.com/upload/files/68001533075.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/kojepizagin.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1e42dff4b---21256502693.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160832045de2c7---12413348139.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/lexetanexotajamotekixutam.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdc85c0f8b---fuzazusesedusumujal.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16103af171b554---zodetesiduxigonuri.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/46862530252.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/defiwatumobopovi.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/24323530718.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/c69b80dfca7081e9aa9357ed7429b128/sigugafujinewipoxedox.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/bifumi.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9312609114---neraxapexasevebedofuj.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/afdecd3a3adf08c06f6436fba96cf06f.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+write+a+letter+of+undertaking+by+parentPDF 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_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 11028 bytes
SHA-256: 4edc47c26ed2cfb2f39708ee521b7660ede300d0d7995106ddd3ce708398b6b0