Malicious PDF — malware analysis report

Static analysis result for SHA-256 1625d495ef0528db…

MALICIOUS

PDF

59.5 KB Created: 2021-09-01 18:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 789f1d8ade29099afff1507814106876 SHA-1: 1d3a7b02b1a3ac72de598ffbdc8ff73caca7380e SHA-256: 1625d495ef0528dbde7a29dc4287135b0ff82fb99adbd448233796ad0c603e8e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The PDF structure and embedded links are consistent with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7557

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://tecnicadovolante.com/images/file/kiwinoxiver.pdf In PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f5cf9c1b431---68569879943.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/56573266743.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/97491829664.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/38265516463.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/zigikeguzup.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/rapide.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/s2f2c3moc9dqjo8hmkqruep110/nawive.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1621704370.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210809025859.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/zatuwopoposexib.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/bipob.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/pipizuboropejixi.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa111b149d7---zomawikorosidubufe.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/84987166248.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c43f23dce1---kebiwo.pdfIn PDF document text
    • http://fairview68.org/clients/c/ca/ca24e3df3ff7fa9b839de6c08aba9959/File/wowudaku.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/palaxirexadeku.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608076789b969---vetapegiletoxojamoguj.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/dagumisudewasowosez.pdfIn PDF document text
    • http://wohntraumgmbh.at/24246771218.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/2d65a6e728d9c8f510eafa65462ba3f0/18746013399.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611eda7a1c178---2413678379.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/nuzomobotevoz.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/tafigusifijava.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=bakra+eid+greetings+picturesPDF link annotation
    • https://mediaget.com/userfiles/files/diluvapidukawowolejori.pdfIn PDF document text

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