Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b1d1cfd41bdc40…

MALICIOUS

PDF

66.4 KB Created: 2021-09-20 09:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: a3e7f0c79b2e53a3eca68f15ffab5356 SHA-1: 528e9d46998cb653fe0dd4719a3f4ec5eb0bfada SHA-256: 95b1d1cfd41bdc40b30dc84235e06248a076ef316bbda5e2ab94aac6b737f5ac
194 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The presence of 'LOLBin token sequence in document text' suggests an attempt to execute commands or redirect users to malicious sites like http://birizgardenhotel.com/. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6756

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161327d9296ba7---25242829648.pdf In PDF document text
    • https://perfecthospital.net/FCKeditor/file/88151952379.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/vavudolapezewi.pdfIn PDF document text
    • http://rayanchem.com/d/files/xefonu.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/7879230985.pdfIn PDF document text
    • https://rajaunited.com/contents/files/89720043665.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/safodumu.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/29094850935.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/56929909329.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/gifojoxowadutuguwu.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394414d7d48---42823060532.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613106e5572ee---12951965045.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/wejifuluv.pdfIn PDF document text
    • http://yongqingtech.com/d/files/20332236356.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/zezud.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021091122313673499.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/82735989603.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/83376226641.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/zuguvubub.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/jewite.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/95097243585.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/75344982077.pdfIn PDF document text
    • http://birizgardenhotel.com/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=telugu+movies+watch+online+movierulz+comPDF link annotation

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