Malicious PDF — malware analysis report

Static analysis result for SHA-256 5260e1ae45e8f040…

MALICIOUS

PDF

81.7 KB Created: 2021-09-09 07:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0dc9ce3e39a796be827eb1df7688d9f4 SHA-1: 0efc0d6b12412c697dbcd2806389817e8ed0f5d2 SHA-256: 5260e1ae45e8f040133c9389ecf55b7ad323fac5063f736867fbaa516fcdaa0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the URLs and the detection names imply potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://medvor.ru/uplcv?utm_term=moto+g+phone+price+in+bangladesh PDF link annotation
    • https://irastuff.com/admin/ckfinder/uploads/files/87878758423.pdfIn PDF document text
    • https://nevisnews.com/userfiles/wevojiwujasixuxo.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/zepotolorufisupe.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/9545224408.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/89003021200.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/24942550193.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/vasosojobatogekofobin.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/77642407589.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/26541131956.pdfIn PDF document text
    • http://ausafe.net/images/art/files/10557783268.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/timogipij.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/7b748bfb21c81fc4d5993c671283e589/xuzatawanipalejaruxawiva.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139499281b5d---26019811516.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea14d562f5---xejuvuxolilun.pdfIn PDF document text
    • http://mzch.pl/userfiles/file/menoxuvazaminenekewak.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/64350569929.pdfIn PDF document text
    • https://kimansion.com/uploads/file/jemur.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/risusupuje.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/gowasepefi.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/setubonidurapoxulu.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/44700177392.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/58444743829.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/62055977784.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/1673929321.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/29221384867.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EF 17232 bytes
SHA-256: ea1f732a8124210634355cb3d77d4ee261e2768f8ba6acbf63b4ba27a7d9022d
font_01_sfnt_off000106ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC2 10928 bytes
SHA-256: 3f5edd2b313109c5966b28de5ceb1b98c43e3edb153fc3d17caea52fb89717ed

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