Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9daab02a151379…

MALICIOUS

PDF

62.3 KB Created: 2021-09-02 01:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7aecc8bc5a685349f4c818b5549683ed SHA-1: 34befe4d46ae4ddd33c70b07bf667f92c96bd620 SHA-256: fe9daab02a151379e26c419b575759160886b34e89c2b9f3df1daa3168053d07
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. This is strongly suggestive of a phishing or malware distribution campaign, as evidenced by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8591

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://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/zejakipizevezax.pdf In PDF document text
    • http://efuturesthai.com/uploads/files/kijewopepulumi.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d398c2ca82---14037977322.pdfIn PDF document text
    • http://ubest.ru/images/file/kutimewazaziwofawajid.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074531544419---15646086443.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf13cd8541---78598142189.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f48585ac23bd59287d6a27f85b2520e1/salelukabud.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161104857d77bb---lalafeleboliw.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/vuranemewimomivekudi.pdfIn PDF document text
    • https://livonija.admark.lv/sites/livonija/uploads/documents/files/pisujoruvafatikewadepuvo.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/gijiradifipapozije.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59ebf50128---voxomu.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/xexirexifepunon.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/72216058322.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/jabebavajan.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/govujakedexozijofeliliti.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/kijasuginovixaxofubonuse.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/81628579944.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/87531207205.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/49f06947a29469d19e76ec21cd393251/woketidajinagezikif.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/pafizebukazududug.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/lanozedivijeludono.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/83906480054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+great+wall+full+movie+englishPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fba62ab702---85852237047.pdfIn PDF document text
    • 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_off0000cf73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF73 10876 bytes
SHA-256: c3034c3874c73227b4403cfca55a39bd88a33ac198190fe0083f5aac91eee455

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