Malicious PDF — malware analysis report

Static analysis result for SHA-256 c792ab9612d65bbd…

MALICIOUS

PDF

53.9 KB Created: 2021-09-05 11:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ef37981cc3298840fa51f35d68b071ac SHA-1: c406d8011897b25dba591bd154767cf00060bb25 SHA-256: c792ab9612d65bbde10c4a92973a51e0a7a56acd0de6d94fde7386603b38f6c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting domains, likely to distribute further malware or phish for credentials. The presence of multiple compromised CMS upload links and disposable hosts strongly suggests a malicious intent to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6917

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://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66cf8ae36a---9844893750.pdf In PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160839c2e3ca59---burifaziropinomasura.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/kamivekiwe.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/45513c78e65214864420498a310de646/dometejuvetonoromefumavi.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/pijejixu.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/bewopesazibejogaxoj.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/komulogasipit.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/23199483111.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/vorobuxoxuzekelinuz.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/susosafugofoximupavareke.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d424770605---93626558756.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/60927735357.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/obd1kshcdetetodnn1vf76dspj/lezipefefazulal.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/16126464958.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/fitenuvuwuduja.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f345d8c7a2---30018173691.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/tararovubixufe.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/27232405724.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e204aeac272---16054494996.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/4825346865.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/takaxixezabitebez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=kettlebell+swing+workout+pdfPDF link annotation

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