Malicious PDF — malware analysis report

Static analysis result for SHA-256 a915e04f4ce208bf…

MALICIOUS

PDF

51.2 KB Created: 2021-07-20 21:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7cb86f76c283ab85473f90a5c9341fad SHA-1: 8941016d38d756a3ae9a18706adca9ba29fe98b5 SHA-256: a915e04f4ce208bf8e96230f8e9c645614059463ae35b254443ff49dcae85b71
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the 'formcraft' plugin's upload directory. This pattern is indicative of a link farm used to obscure the true destination or host malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7126

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://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160842fa76e62a---kilamulejugisezujil.pdf In PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9bf9f4bcd06be8a6916460b00d6bb0a4/liregiginagi.pdfIn PDF document text
    • http://denge.aero/upload/files/75379541100.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff06060eb4---99582126227.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/16641776367.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c123f78e30e---62025329651.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c192dc616---93570472297.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607380bdf3c3f---bokeremawad.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210720_3156F0DBA65B5B60.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/70260561460.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/bbc66b14c5b0e1d0f67fb10f49a806ff/vefexano.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/bunevujuzitumeladofaxitu.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085cfbd40231---81730473057.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/qsa2jtek1dq3r6jlkdc0442v0j/jodosalaf.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073e47c70e9c---pebodatugajud.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/df682da969860fbf1b0a089bf8358287/50993676499.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/59310710641.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4a879a870---gupejemosawimafa.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/61322460316.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c49f273e917---95641524788.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd7a244cb7---85943586684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=jerry+bock+and+sheldon+harnick+musicalsPDF link annotation

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