Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1098368739391b…

MALICIOUS

PDF

54.6 KB Created: 2021-09-01 16:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cd653aeaf56eba0d513878da7301a0bd SHA-1: e0f4484e84082113107af64ea2d0a924e52959a6 SHA-256: ba1098368739391bcc5cb67ece9038a55e918398f364a8d814314f5bbdf2e21a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting, likely intended to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users into clicking malicious links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6436

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cissud.it/uploads/ck_editor/files/44047886657.pdf In PDF document text
    • https://bosgo.mn/uploads/files/86322350409.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/10229387579.pdfIn PDF document text
    • https://aashianarealty.com/file/36438661552.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfaf0f075---53585759942.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0ebecc80---18480087693.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16125d3074f3f1---sumopolevuvob.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e5e069082---96582478413.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9849995f9---35886666212.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/44114415198.pdfIn PDF document text
    • http://allasclub.com/campannas/file/27610620777.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/ropifalejevunugabifemizu.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079677f9b477---joxonuxururejeg.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/koxitoralidinotepuju.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/4b7d8097757d4f1f736b0e7bb5bf8f4f/26571000684.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/xuxivizemidoleru.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/38579097800.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021072211545661.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/1884a51a2c550c567fecc23fd19658d7/jitodasopa.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/63421682013.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/sajunupenexeris.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/6575219466.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/h0tieueogjq3l18gfeg1jrg2e2/liwoza.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/17635436737.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/o6j9l8pt0j00i4rm2j2h0n0rp4/67301307029.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=nuclear+physics+lectures+pdfPDF link annotation

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