Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa0f2b1d8949178…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 11:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 083973404a07a0cf12419f1e588c9f84 SHA-1: 3e6db3932801c07d27cb7b3c441036ce882cdbba SHA-256: 9fa0f2b1d894917804919f5aae63b010bafdeac04420461fb6e3e9514e457b48
154 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to lure users to malicious content. The presence of external URIs and link farms indicates a likely initial access vector via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7495

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://dasbluemchen.com/papir.pdf In PDF document text
    • https://kamarkosong.com/contents/files/22563995133.pdfIn PDF document text
    • http://rapet.hu/files/jufomis.pdfIn PDF document text
    • http://guitarenko.fr/img/files/22970397203.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/kajuwuzenalek.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/jewepajoxev.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/funufafuzupibimugifom.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c0642de95---21116104864.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/027378068bdd8ec117501874636bcbea/47131077249.pdfIn PDF document text
    • http://signauction.net/userfiles/file/dobumebadigoredibitej.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/tehs62i9496a41q0qp8h27eae6/bizosofuta.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/52886882549.pdfIn PDF document text
    • http://grandfiltr.com/files/file/36443047104.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/41904301945.pdfIn PDF document text
    • https://arendic.cl/files/76531717253.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/58154122603.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/18085480108.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/48364088977.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161443a27c289e---28749657986.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/59041732156.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/vasasususok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=vidmate+apk+download+install+old+version+2018PDF link annotation
    • 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_off0000cbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAF 17992 bytes
SHA-256: b88106c22f5d02655c74d3de79c73960548f7a0001d4c2447e998e1c64246a3e
font_01_sfnt_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.