Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bb1cce2b7ef0a5…

MALICIOUS

PDF

62.3 KB Created: 2021-09-03 08:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9d742f03144c65c68d843a2632d7338e SHA-1: dd910d7a85a7b1d748ebe4a2f9304f002dbc3b75 SHA-256: 88bb1cce2b7ef0a59b467dcccdab06bd79f90cac89e527f5de7887ab0667df8d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 https://garglob.ru/uplcv?utm_term=general+knowledge+abbreviation+list+pdf PDF link annotation
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b309aa4638---disulodefifuraxowax.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/wibujosetefego.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/fabtg8k7472mv2g4jq1kl02tus/wozawijirisin.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/46678345227.pdfIn PDF document text
    • http://texmet.pl/userimages/file/zujuxojixekabodipuzule.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3fa1a74b2---davasojususoleri.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/disubiwopakute.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910ef152114---78504984188.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/55a3bf872e9352a2e1e53bd9c22a27f9/16875528022.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5df779bce8---48291329184.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611730f655d83---29305551744.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160841374e631a---26862681162.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/a7125c272988a2e9fb7dfd7dc1c9d9ca/56486303912.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/71907152154.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c355453102031a77959428db26ea07f/89722997666.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f211873a7---72231874048.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/11746917875.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe8285d99---pilofewixaxejunaxubumabo.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/58507413694.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/xizefexejugimuvuwinumu.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/fovakuvudijefenoxisumumi.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/89e8f7a0f66a624f30aefa176e0eafc1/26206366789.pdfIn PDF document text
    • http://thevelascofamily.com/clients/11614/File/43232031507.pdfIn PDF document text
    • http://kaies.net/upfiles/210727031802307117gym21c.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/59531479317.pdfIn PDF document text

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