Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1d511fdfab3c33…

MALICIOUS

PDF

67.9 KB Created: 2021-09-07 07:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 03c13442b776869434987a290b36a6ee SHA-1: d379454247b19ddfd684298aab65fe26904c50b0 SHA-256: ee1d511fdfab3c3357bfc25a48f1f94f459db6cc45117d23831200078d42d322
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4829

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://synerhu.ru/uplcv?utm_term=black+hole+sun+piano+pdf+free PDF link annotation
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/k1l0u31k5emnrhhgcfpr9j2tl0/67965828270.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/lagot.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/dewukexelutib.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/37194449079.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/28884033360.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/kuvilikomunef.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/wusujapojotogizofoxonake.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/a140b28069a58d50fb0a2cd1bc2c9169/24154807581.pdfIn PDF document text
    • http://pk.mo/userfiles/file/94819847864.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dccd13d96---guruvumamawezaxijapenad.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1pkraomnsvr5rni9mdcoq08v67/41454009162.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/sexazarivowononosurebe.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/nezojese.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4fa01624d---dewipizixuzu.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/91479966358.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/59c46489239a2e7f3c581a4bd0f3d45d/tifiv.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/2728262444.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/kumapenudafufexagadusup.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585e853ca3---58275180545.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/roxagosa.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/vusalopolixod.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/62894255300.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/xamajesixuzewite.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/32965269212.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d682f3357a---8323017171.pdfIn PDF document text

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