Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f0c17208895b15…

MALICIOUS

PDF

70.2 KB Created: 2021-08-10 22:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4921af2bfad91def34385112506d147a SHA-1: dee0a6743a4b725e23fa3a9a71b10774cfe9d9dd SHA-256: f7f0c17208895b152f6054994818bf0aa73cf92184c89662b551d1ed88059b02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and the overall structure indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9290

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://spencerrandlefamily.com/clients/864257/File/46853334111.pdf In PDF document text
    • http://jarosi.hu/files/file/53828913271.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/84106809633.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/susidodudakemutojamonupe.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d55ce10274---61104911737.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/3bb51a5f30841003362e82b2854a77a9/maxevisujekawu.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/8e41d1c6175b289b1290c2086ad3aad8/95894063739.pdfIn PDF document text
    • http://robbes.nl/media/files/zijapidikiwew.pdfIn PDF document text
    • http://ned.ru/uploads/files/xekula.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/153017b06d5f4b9c07a7568e681e91b1/pokovekalejojugosivemo.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087acff10602---vudaniwugiguniwusapitibu.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/vsk69bjdc4ihvffnc9458rblar/56084805607.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/zupogotodafosisimezu.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c164de05550---59161892778.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/d68895aeb84100e5a9989338bf7d106b/darafakakinosera.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/ac6be1.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160890e3b3db94---juworutofibipo.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1061d04233---porajivogof.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d8b3909f3a6221b7ad3b84f74e2929b2/44396391547.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/9c6990bbfbc55462a08d976eae8e95cb/jupigu.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a26b4001006---49494080700.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/a709bbbef3167b7e891274a9d187751e/77262180925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=tangled+full+movie+in+hindi+download+filmyzillaPDF 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_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1