Malicious PDF — malware analysis report

Static analysis result for SHA-256 762930bf7402e08b…

MALICIOUS

PDF

72.1 KB Created: 2021-10-14 22:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f07133b9d0a7b2eadcb73b67f10008c6 SHA-1: 7ae74fe5abe98a57636a1e12aae021e7f413ab47 SHA-256: 762930bf7402e08b53b6f7147b3254ac4deed6bbd7c1c0be12ae2639ba9f88e3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads and disposable hosting. ClamAV detected this file as Pdf.Phishing.Trojan, indicating a phishing or trojan-like intent. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4393

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 https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161460dd3d89d5---94693315220.pdf In PDF document text
    • http://kaitosushisb.com/uploads/files/jivulexusazidowoxovuf.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20211003175328_c2l0ZXdpa3ViaXdpdGl3dWw=.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/a6296769703ebd79c75e26aea0140863/salurewatex.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/72803312159.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/zejusanodize.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/kibobupigulepazi.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/dizirew.pdfIn PDF document text
    • http://ozkayalarlojistik.com/userfiles/file/wamokodirali.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/97689249481.pdfIn PDF document text
    • https://refurb.onlineconvey.com/In PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/34841813216.pdfIn PDF document text
    • http://enkepharma.com/upload/files/fixeje.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/koxaru.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/67c8a4e674546bc22ed3157f272244d6/79684134331.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/werujadadomakosukagefupen.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/61082603554.pdfIn PDF document text
    • https://valuekare.com/ckfinder/userfiles/files/welabupevenada.pdfIn PDF document text
    • https://rinducm1.com/contents/files/soragakoxufabunef.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/sufikitaz.pdfIn PDF document text
    • http://teifsepahan.com/files/file/3456019316.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/gejapigapupu.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210920_C01A68AC968ADAE7.pdfIn PDF document text
    • http://cpviettin.com/upload/files/maludupupobepupif.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/HKUGBsJGI0E/uplcv?utm_term=number+density+of+electronsPDF 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_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 10808 bytes
SHA-256: 17b16e1d1dd1ae48bde45a7fc621cdeaddff2f3928b668cf8d62a49da6c91aee

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