Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bee5e6597061c83…

MALICIOUS

PDF

63.6 KB Created: 2021-09-13 18:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 82ec17d37831165c580d3ff043bab0f9 SHA-1: dccd442638678ef51b41e64b89d8dcab13e5a07f SHA-256: 6bee5e6597061c8305c11a3784fd40c063da048c25b6b19f93801caf73f79383
154 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, likely intended to redirect users to malicious content. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7082

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://smidgel.ru/uplcv?utm_term=honkai+impact+controller+support+android PDF link annotation
    • https://predial-rua-nova.pt/056-CovadaLua/images-editor/file/80959223624.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/futenarifumigoraza.pdfIn PDF document text
    • http://lachina.cn/upload/file/17799511886.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/batitikowosami.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/49107554704.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f97f4d53ab---barik.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/7299304666.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/25466300057.pdfIn PDF document text
    • http://henca.com/files/details/file/42018740614.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c34d5ef535b85a28c9ef2041c7e8c438/getabulojekusalokejax.pdfIn PDF document text
    • https://dm288.com/slicice/file/genaruzeletabitajulitipud.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/vezovuvoletepuperavafo.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/rafevixujilarowegixokez.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/88384854203.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/59862842513.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/78157422574.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/zuvunanakofuluranalugojo.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/vetosav.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375171bfb80---93132071608.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/79696223382.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161380cb8895ef---96240381603.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/fabiga.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/maviteli.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/51456310262.pdfIn PDF document text
    • 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_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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