Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa07fbe627bdd1f0…

MALICIOUS

PDF

72.9 KB Created: 2021-09-19 18:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 90ba4dd1b9165f228545b8c5a20c0ae8 SHA-1: dbdb0cd98b7a627cd57d776af5c8311ebed93c94 SHA-256: aa07fbe627bdd1f0f3742f10f258405ed26ac69fe1aa4293bb85329148f2f554
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and flagged by an ML classifier. Heuristics indicate it functions as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

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://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614104b317fbd---fitibopawoluzudaxo.pdf In PDF document text
    • https://skywaynepal.com/userfiles/file/59088207527.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/27925515707.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/xinulitokegewefefanebow.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/xolonezotimode.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/82251632582.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202108311836148402.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/bimodukujema.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/xufivuvubinek.pdfIn PDF document text
    • http://heichapuzi.com/uploadfile/file/xusinuzipaperimusovur.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/fasoka.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/22051862606.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/masevukakeboditar.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613910eadd368---68646222095.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/40627338087.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb55580a4c---magovidinu.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161413ae77b282---14515117525.pdfIn PDF document text
    • https://haidangpc.com/contents/files/83100289232.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/kabikivefiwipiverefoxejot.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/76920972784.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/28619960528.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/17853740243.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e9672684b---fokotojuzifidobe.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9714b3916---ferapusotafazoza.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/meferosiralidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=moto+x+price+in+karachiPDF 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_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 20964 bytes
SHA-256: fc2b7a0f1adc52b4251a59f2b81b611abad2fff7fde975e68e53587eec074e5f

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