Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfa4739eb866042…

MALICIOUS

PDF

74.8 KB Created: 2021-09-07 02:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f9f9ad94f85777a47e25ae06829b7e97 SHA-1: b716e79b7b4c701eec9e6987b989953d71b04c83 SHA-256: acfa4739eb8660420d0d2478e9d0e9e7f0c6c89e1537aa9ab6c65b0c0dad1ceb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

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 http://moristas.com/userfiles/files/1157404589.pdf In PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23f3056653---sufinoxojoxigun.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/70588901070.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16071cf0fb3189---xerifafunalawuzukekew.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff1cc2fa0f---35134778303.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/83364716158.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607de4064b31b---sazujesu.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/cc12af120e85077ec6f8ecb206ed2e9b/vopazuvutexazi.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/a16d6cdefdfe194819eea9cc42ee745c/27496695893.pdfIn PDF document text
    • http://davcpundri.com/css/file/wevag.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/54762022254.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/wuwadi.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3fff13696---nadawexotexoratejedogab.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/22679588603.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/85508666185.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/bikupapot.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/409480483.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/gibal.pdfIn PDF document text
    • http://kasargod.net/uploads/file/79255848822.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/lexojerixiwivikijazif.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/74383651390.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/dubekimipizi.pdfIn PDF document text
    • http://geose.ru/userfiles/file/95790496953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=kindergarten+sight+words+tracing+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CD 10932 bytes
SHA-256: 2d1d09630fa6a1a18c5e296180268746b5d7fd5feec638c47648a8d1a31b4749
font_01_sfnt_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 17236 bytes
SHA-256: fd5c1bd9970e187ce2f37523621e6b1ae33df7ad45b9d6209ed4937bb712e14f

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