Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc39a9f863033a5…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 07:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e34cc06912c825cc259fb8a8e2860239 SHA-1: a6f3a6888f1e8ca75c555d201b4696b4218fe3f9 SHA-256: bbc39a9f863033a545f4855a16f559f6b6452ff0405ec018f93050807f7c52e9
154 Risk Score

Malware Insights

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

This PDF was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for information. The document body is heavily obfuscated and unreadable, but the heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

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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