Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8acfa41c3b7fd6…

MALICIOUS

PDF

73.5 KB Created: 2021-08-14 23:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e155dad97a59d50aa427667368f3294c SHA-1: 918bce8a3755a4d6fd60ecfd41a3aef85f89f826 SHA-256: df8acfa41c3b7fd64f976687587966b0b112036a3c1f56ca95ebd0dd0020a050
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL distribution align with common tactics for luring users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6661

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://drafthe.ru/uplcv?utm_term=can+you+connect+a+sony+subwoofer+to+a+samsung+soundbar PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27b22d6d1f---kuvifinomejivosetakojufo.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/62706840808.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/53063443173.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/kojizadovu.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/kf3e4hd3poc18bch4bj0nqtgte/6012507130.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/sizolifefirefav.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/717235a22f13ddc434efb850fee3c5f6/lisarezabukomixodatanuto.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/lujimevomol.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/68477136021.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/12973830413.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/53976980704.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088088edf8d6---92344292671.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609042f489815---fuzowozatifowuguwe.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/voperexajizosolobab.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/290aecb198bd5119144049b5c9f0a080/roxanitolofoximegotu.pdfIn PDF document text
    • http://knoxvillecentralhs1966.com/clients/8/8c/8c0a3a1fea337096d337135aeb812fb1/File/77276088812.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/vagagud.pdfIn PDF document text
    • https://lesura.net/userfiles/file/83371693549.pdfIn PDF document text
    • http://clingac.es/d/files/robitimode.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6f08b6444---84666371515.pdfIn PDF document text
    • http://asqcert.net/files/files/lubifabipadavifep.pdfIn PDF document text
    • http://imaginove.eu/data/Files/letokugirijazonej.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f17f29df1---1195534030.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 11152 bytes
SHA-256: 23e991b966f1941882ba0013dd92e0a867154e314c06f0d19c4d4351027ac47c
font_01_sfnt_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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