Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e748f897596dc41…

MALICIOUS

PDF

52.6 KB Created: 2021-09-25 07:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b2e22a807c8cee56098462944def6bda SHA-1: 672c47084d5a7a6ef7bbe1663fc26bd275b33e66 SHA-256: 9e748f897596dc4111a5de1e850f7ef428c656d85ee14a25c69cf4bee2e6789d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6586

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://chcial.ru/uplcv?utm_term=change+default+file+manager+android PDF link annotation
    • http://puebloexec.com/userfiles/file/gebunat.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/worotekamojaje.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/neluto.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613fc8bbc89e4---xazirizodewasopu.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7476bc9f---jinuwez.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcd236cea1---78330775682.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/fuxatuvozozarasepojere.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/gozabujoxemo.pdfIn PDF document text
    • http://taixingchem.com/uploadfile/file/20210922030412563.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/pixekiwugog.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/52370115885.pdfIn PDF document text
    • http://fitviewer.de/files/file/jixig.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/88065155145.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/losakexufamisaxigozum.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/de08m15maj0996plkuvignne43/domajujafiseliwuzon.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/72280458376.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/74802287933.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/rawifofesavezamesemofuj.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161452ff46bf05---kaxijunifagowalipuk.pdfIn PDF document text
    • http://ranch.pl/files/file/63533704679.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/diwoli.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/sikesobi.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109220517022132.pdfIn PDF document text

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