Malicious PDF — malware analysis report

Static analysis result for SHA-256 8652624a199621b4…

MALICIOUS

PDF

47.7 KB Created: 2021-09-13 05:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e6b4975ff20d1aaf15981f012a2fe6f4 SHA-1: 29e2469b87960c6e876e1b2a6986772f30cfab8f SHA-256: 8652624a199621b4a4b2b946d5247bd34065bef6849ad6c6abb6ad0283f4a770
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute malware or phish for credentials. The presence of external URIs and link farms indicates a likely attempt to redirect the user to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://wastran.ru/uplcv?utm_term=naruto+shippuden+ultimate+ninja+storm+3+download+for+ppsspp PDF link annotation
    • http://lamgi.pl/ckfinder/userfiles/files/puwut.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210911_010618_8801.pdfIn PDF document text
    • https://anandalaya.in/resources/file/nebudorujanededi.pdfIn PDF document text
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/jifuluzo.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/69109100065.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/55270914743.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/rupogoz.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/pujagifufu.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/tupexo.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c2f08d457---mijexedupexep.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/43586428883.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f63bb58277---7961219703.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/89833100588.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/fezeruxekawixopediwozeg.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/sinudowex.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/41976620248.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/viwumejukidi.pdfIn PDF document text
    • http://simsoncantho.com/userfiles/file/zizemurajasawiwibujulifid.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137db552806b---485415552.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/pogifiloruzusexikajofina.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/girobafiguxiguwokepawez.pdfIn PDF document text
    • http://www.bash.cl/media/file/89757315567.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/28190772533.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/71131096381.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c05fe0383d---vezafeve.pdfIn PDF document text

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