Malicious PDF — malware analysis report

Static analysis result for SHA-256 7027fc7eb4e9eccf…

MALICIOUS

PDF

78.1 KB Created: 2021-09-03 11:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9bdcb53604803764fefc94184e59379f SHA-1: c0b9b536f6b5f5bd971e390faa1c77fdb9b81f84 SHA-256: 7027fc7eb4e9eccf0c6eb45759f4d68ed774213f8809ec014634e78e81d35db1
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure suggests it's intended to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6354

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://phutungtdc.com/upload/files/teziminipovalogewobopiva.pdf In PDF document text
    • http://konferencii.org/web/uploads/assets/file/13043622559.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/89812828838.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/22h9g7bjvruntlq7v556fr7pq4/pasababirilusuvumifodoko.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/pewozetozadaxir.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/5212d1219e8ef7e7d92367ab3afa930f/78517497179.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/jisawivurojafawimo.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/bn1k8rju95j5pdj7c8jb6uu6b6/vopebanofedixizusuvevirut.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/62611083463.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210816025911.pdfIn PDF document text
    • http://totoumi.jp/upload/file/luxobovil.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/76326728488.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/8d558d2ed5099195d3d6496c12036674/wukoxukubugivenikideso.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b65cea11d---dozebet.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5cd0b4d2---vatosetibifo.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/8868001441.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/naa1217pnc4n5clq2evgpmbr3h/27859689220.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160773418c3edc---mezajixetub.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/32692655546.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/62871196247.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/54657946922.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/rorowuwusofakenewamisoro.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079192358218---67645968791.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/mgnhec3fvtfcc4tatcljqt4bvf/88088719980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=love+the+way+you+lie+piano+pdfPDF 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_off0000fbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBE 18600 bytes
SHA-256: caed3aa5fb2b75c3e27c5245087a7a6ab37adbeb7263ef31368892602773e6c0

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