Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2c5342ac1940d8…

MALICIOUS

PDF

64.0 KB Created: 2021-08-31 00:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0713536c8b0e136efaa49c1802f69ffd SHA-1: cdbb49b57a498414bb21bee91395d64eb938b8de SHA-256: 8f2c5342ac1940d821cb9be98ccb5e3e02b5e9ac27855942e09fd914f3cc1d81
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to potentially compromised websites, suggesting a phishing or scam campaign. The PDF structure itself appears to be a link farm designed to redirect users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9193

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 http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba2143ec53---xaloranijigapit.pdf In PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/kinowotasif.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878cbd9ad0d---zolalizevetile.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/1954918694.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/gubokewigunoxigekejud.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/dikalib.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/43007216509.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161278097edec3---serujenukibafatosejif.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/54412739182.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e0ff06506727f3fbb8a08c8dcea7e5b0/sovejawaza.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/1ppo9tq1ujqnafvehd1kov62e6/73407947209.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9cecd52693c484ed322b01889816f00e/xemov.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abceea0c3e6---nejapal.pdfIn PDF document text
    • http://c-amc.com/upload/files/23854765207.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/5175420027.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609de8b9a81a8---88630409404.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/59620152682.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/sinafimipupomabep.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfac9d62d1---84216488996.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/78867209690.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/11245ff899ba39993e8415345e3586fa/14249397187.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/rojumumiruxapinuferojuk.pdfIn PDF document text
    • https://latework.cz/soubory/jekupatarux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=scooby+doo+drawing+picturesPDF 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_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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