Malicious PDF — malware analysis report

Static analysis result for SHA-256 a769f98628842766…

MALICIOUS

PDF

47.3 KB Created: 2021-09-09 17:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: babedca6e8ee128e40171923c1268387 SHA-1: b0b3755e1f6791210f5bdfc7c2481c814d730a8f SHA-256: a769f98628842766d74fa19802cfe06c474d78883bd2148f6448eeb5af07f102
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm, with several URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the heuristics and the PDF format suggest potential for embedded JavaScript to facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8587

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://freehajjandumrah.com/admin/admin/uploadfiles/file/jakowifewopobowekujinor.pdf In PDF document text
    • http://www.anaja-inter.org/public/file/befiteraxidikosenudi.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/70696092970.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/12654476796.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/81215847425.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/84273593561.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/penezudubosu.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/gapevosukijesugajesuwu.pdfIn PDF document text
    • http://dentistturkey.com/image/files/vaxomugaxevetorok.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/muxasarutataw.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/32869435161.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/xumijuzeselolisoxamalob.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/2557783915.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/97225410720.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134de3c4cd9f---dutowiwi.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/vugewuxenafipepupegasuva.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131b2d404cfd---86836878128.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16131778e939b9---29845448526.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/pumixexutipegefuvowefe.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/74897205109.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/telelu.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/86275322333.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/161314771d4673---lijibis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+silence+of+the+lambs+screenplay+pdfPDF link annotation

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