Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f03f453131a83ed…

MALICIOUS

PDF

95.5 KB Created: 2021-06-04 07:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae51ff333bff7af4d8e2982e45be5a6 SHA-1: c5a9725a45a2841980af053ec67fb67d8bfd977c SHA-256: 1f03f453131a83edd98834810c4ad50f67f8df62da0fb8b7f37310fc15d8ab4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9553

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://xn--e1aazeoc7d.xn--p1ai/images/shared/file/49667693706.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a0eec41c3262e76965c4254823e5ad13/41540338412.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8294b5e86---nidilapaxiwozebosu.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/30k9qq1kkbo168qsksi5m25a64/dawasamikek.pdf
    • https://taevlingar.se/images/pages/file/56414872908.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160833c8f22ce2---xaxutele.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/luvakubuzosisotukofo.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb29eb6559---67870204423.pdf
    • http://lavalnerina.it/userfiles/file/banolade.pdf
    • https://ottenburger.com/userfiles/file/20863165232.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3fd94fe39---94636540191.pdf
    • http://ifa-astrologie.de/userfiles/file/64996378313.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9ec95ce27---34668378432.pdf
    • http://aarogyamedico.com/userfiles/file/89573610849.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8e26979dc61dabcc89ab39bae257c01b/71192890480.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/47b74af75166736747f1b1ec95cf79c5/nosur.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607812a36ff9e---jesisavozed.pdf
    • http://sskj.pl/userfiles/file/68062010945.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+hack+modern+combat+5+pc+with+cheat+engine
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016939.bin
00c63e04dc5d0ad9bdff3679d7912d0582ec1900ff01b1a194762b45e8cef6dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16939 5448 bytes

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