Malicious PDF — malware analysis report

Static analysis result for SHA-256 754ee742e6b68d3a…

MALICIOUS

PDF

54.6 KB Created: 2021-09-23 02:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b0350adb61027df152b6e1285986e641 SHA-1: ec559a4459bca6058dc892fff5fac06eb9f90842 SHA-256: 754ee742e6b68d3a0c5d8c3b57d0dbbae624a75bd434730a417128e73189039e
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as a Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to external resources, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8550

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 http://ahjygjg.com/upload_fck/file/2021-9-19/20210919043009139197.pdf In PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/9c857dadedf31e5cd505387d0bf72c56/dinebenuxirowijikosov.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/bixekoriwaj.pdfIn PDF document text
    • https://ancoraeducacion.com/images/vexadexovesegenux.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/38064548123.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210920003512.pdfIn PDF document text
    • https://bczenekar.hu/files/file/rebezur.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/98946046101.pdfIn PDF document text
    • http://napiarsaigh.com/images/43803916901.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/xelupidezujumozef.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16137c26930c9d---zabal.pdfIn PDF document text
    • https://bczenekar.hu/files/file/gifogisur.pdfIn PDF document text
    • https://tckontrola.hr/files/pujanarakibiwapokona.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///66057261188.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/a3e1f6421e235aa234427b1dcb2b0939/tupabozimijukamoxewisoma.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/sokopizizogudovajowe.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109222051079298.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/xulumefoxazawibeg.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/rijerujigetimekazavuputam.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/dumonuxerime.pdfIn PDF document text
    • http://foodchemsino.com/d/files/28268549696.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c38177cbe---33741059924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+stop+notifications+on+androidPDF link annotation

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