Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e959f11d02f860b…

MALICIOUS

PDF

65.4 KB Created: 2021-08-12 07:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5d7fe3b105bba8bc4322f11d734b022a SHA-1: 311dc1bc315d9bab333c50e0b5ee80862c4d1b81 SHA-256: 0e959f11d02f860b8912b2602febbdab9e27339a352424cb4aaa17107b06c74b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to PDF files hosted on various domains, some of which are identified as potentially compromised CMS uploads. The document body is heavily obfuscated and unreadable, suggesting it's not intended for direct user interaction but rather to host these external links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

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://studiotecnicodavico.eu/userfiles/files/mozowifasixadene.pdf In PDF document text
    • http://ahkjt.com/upfile/file/82171692381.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/25082604125.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/sedakepitopugijadeje.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/29507033876.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/62116546597.pdfIn PDF document text
    • http://cecev.com/stockages/files/39549682459.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/4eceab6f4f419adb5f7f0bd541f02d51/welasenunusug.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100f93f5e205---jibesu.pdfIn PDF document text
    • https://corghialberti.it/file/33589681218.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/1fc0d5b13fa240cb9c06950778a997d4/25337415891.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/zipipuzovosokuw.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc48084e90---palojikemogovifew.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/e0c86ce680299d2763609127f65942bd/lixititojunudova.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e436af167d---31840271285.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ace8c760d---94807300224.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/zifuboduwi.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/eb60co8stod1kldcdpuojvv3sd/7450971584.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/45243169283.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb9ad7ee9---lavudanaxewenekesasigute.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/mizudufupefakuxivajujorij.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/8ef5c1b6b97e881ee936432944231943/99939729748.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/42205173751.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/5920180599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=lohmann+brown+chickens+for+sale+western+capePDF 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_off0000c2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E9 11020 bytes
SHA-256: 70a925f1ac32205d5b0e682b610765eef208e64601d2ba0621b2771f987636c8
font_01_sfnt_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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