Malicious PDF — malware analysis report

Static analysis result for SHA-256 259a9a237516b59c…

MALICIOUS

PDF

70.3 KB Created: 2021-06-09 21:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9907b1bbaaf88f24ee9a4b529c826a20 SHA-1: cce32d0fc4929e9d65ebbd230ca66d9f74bb4306 SHA-256: 259a9a237516b59c24ae1a802680c74c5bb1b18dc02ef4fc263de0986346967d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or initiating malicious actions. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the ultimate destination or leverage trusted domains. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://cructi.ru/uplcv?utm_term=pal+pal+dil+ke+paas+rehti+ho+song PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1cd648246---80814121981.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d229d26a2d61c58db6d01690da10256f/91762200298.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b32b1b3d616---sugalejafarega.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afdb2d5c608---zoxuzotedoveti.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb95ce3c0---zivaseboxifokuvotigete.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/84a033b44fa84975aa7ba36372157746/dewofebebimupurogikevugi.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/6c4ce0e0a422d527748341c3433fb709/fanevizigezofafozar.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bbd4ca64d---gujuberidufi.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/petekebinimi.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/86418493889.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098847e69f9d---73219845385.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609d84f5bc7b9---xozopux.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd5c6d843---jekubovitafivowubatuzis.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e6547d2b3cc93cfaa483e7230a32a910/92771712838.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/84990686082.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/67409959658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/bfe5bc5949ee175cc3954d0a63f37ae4/86588259196.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 5284 bytes
SHA-256: 3495b9e2f7c045bdf391b2d9ef28e70e33e8ac89ebc76510f56e19864fc91c36

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