Malicious PDF — malware analysis report

Static analysis result for SHA-256 110e1f4e0b4c69ec…

MALICIOUS

PDF

61.2 KB Created: 2021-05-09 23:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24a27d14055fdb227ab036b231910f9e SHA-1: cb786ee52d3688431b71ae73cae62ed0895a4930 SHA-256: 110e1f4e0b4c69ec793ce1af113e80b88bb982694506b9fcada9fefefe5783c6
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier output strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URIs and the nature of the heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8016

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=abviewer+11+free
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d142c0e5a7de9a970735f3a6b1c5cf25/xafopufodev.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/penbjpvpn2js9lcj4dhmq1kbbk/35234773038.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d87e5d96e---luwokep.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/1659777517ea9ec72d726ac2c81ba7e6/davaxatefifotazomoko.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072b484883d4---wajuteboxujuvejadumuxomij.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16092f9b463f4a---41364219557.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160866350a5593---telunisujinobamadujeb.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070252d85cf6---nepabitijukewegum.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160817bef63781---51684304326.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609142421f0ce---62797677721.pdf
    • http://cuatro-pr.org/sites/default/files/file/84869826762.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/989b480eaf1c1a801f370462412c7392/65098582138.pdf
    • https://alihuata.com/userfiles/file/44185301741.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16087570199818---nidebirise.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5307c326936f4602a83a7e5268da6f57/16498630414.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/05ecd482f0402bf274d941cf0fcdc12b/wamos.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608627502c219---lolevererojalep.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/c37592ca61a3c504a58d2d5a06b23d0a/98248430234.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2de.bin
f8528c6eb31bcad41fd085ab2f62aa91deca766286df9681dceea3fc31195044		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 4676 bytes

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