Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df90e117aad5cec…

MALICIOUS

PDF

62.3 KB Created: 2021-10-07 13:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6265a2e7337f2671734865331355dc63 SHA-1: b6b361b292667423f1f094e7d4e5be24062e5e81 SHA-256: 0df90e117aad5cec19a2acceffbc2656312e611fc0012530dc6c116a386c1506
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6040

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=how+many+sixteenth+notes+equal+a+half+note PDF link annotation
    • https://topclassgreenery.nl/images/file/zidapamujowa.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/59576334795.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/ravetibofajogotuguzupe.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e9b3755fe---78761578259.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/32265286481.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/67773141219.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/4a3a969db15932a9d500d32ebe2dea44/dekilowemisalowevexu.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/48103653959.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614687d04a01d---fumubetijagakewe.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/bekusitibesutazojuv.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/zexikivawuduninefo.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210916185132.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/46419892568.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/rojenixariwu.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/13942554302.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/15154107437.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/wusixixuviwajiju.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/komurapiporijamagenujuva.pdfIn PDF document text
    • https://henuopack.com/d/files/lugokegifojilip.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/41806931689.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/48599929564.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/59282705185.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/42294010807.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-13/20210913010808639152.pdfIn PDF document text

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