Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a70648eda7749b0…

MALICIOUS

PDF

93.8 KB Created: 2021-08-16 12:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: ed9f2477feb35d10c65df33a70760109 SHA-1: 891044e884b1ef6ae97e4166f2de447834840a96 SHA-256: 3a70648eda7749b06ef87cdf3040772dda1bdd59a235f3fc667be9d39d2608c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, with several pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5454

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://daulte.ch/ckfinder/userfiles/files/mudorekizeraxuxezuxumume.pdf In PDF document text
    • https://sharmtocairo.com/userfiles/files/28716847491.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/nelobesuwedogosudob.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/58414699214.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89b26c545e---nemad.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/16975447773.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd9c12a01a---79006834902.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/69811299373.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-11/20210511114938543641.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074883610722---37302443973.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/pupibapejawepunebana.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/jelenadewafowepojuvu.pdfIn PDF document text
    • https://coevent.ru/upload/files/80098579491.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/2887343398.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/16833328172.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/13725023737.pdfIn PDF document text
    • http://growourworld.com/clients/83159/File/poliw.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/budifavawajetibiv.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91e322ecd---vosakog.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/18731784662.pdfIn PDF document text
    • http://superbarter.sk/media/file/11590450104.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c30e3b4fe2e---zaxezo.pdfIn PDF document text
    • https://bursac.net/userfiles/file/94600275850.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16106cadf6bf0e---lipixuv.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/28880d900d483bc0af5c56fd88fa2d8a/nebusepugugo.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/69412760304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=advanced+excel+notes+pdf+in+marathiPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001581b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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