Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66d0c5318db7edc…

MALICIOUS

PDF

44.5 KB Created: 2021-09-27 03:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7baf8f10b442fab54afcc06af2d0e975 SHA-1: d619287b206c627398a70f17f0f852a9b9838ed2 SHA-256: c66d0c5318db7edc1e77bdf92b415ab44e353302a2aa1f1dd18fcf6ac9f03f2c
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple disposable domains and compromised WordPress sites, suggesting an attempt to obscure the final destination and evade detection. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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://alpinashop.rudy-ra.com/files/jubebuvomutaw.pdf In PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161409d0d81cbc---wabukolijamolupam.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/96552364467.pdfIn PDF document text
    • http://elitvorota.ru/f/file/82610647854.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/13369079262.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/5c3794f7a5f34b9138128041c829d0a3/varamunu.pdfIn PDF document text
    • http://pileki.com/imgup/file/27411942908.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/supamekogaguwemikezili.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/14336823133.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161404d85eea7e---xujibodefibubekefuvubuvel.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/doxekivevunenufegu.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/zapagefe.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149227b66d1b---xekudazedadebatumoke.pdfIn PDF document text
    • http://bscartridge.com/pic/gevusopagopepu.pdfIn PDF document text
    • http://iccjsc.vn/images/uploads/files/nudetur.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/99760125358.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/567081d7a12cdbc114344ff33b4d0514/tuliwipimibodub.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1b19536900b3d14a5d398f732bf13a10/3583296440.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210903010539.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/dulubasuje.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/gutaxarojoga.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/tuzoxeserevabif.pdfIn PDF document text
    • https://designclarf.it/file/doluserefiki.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/89726403461.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/jewegidob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=hate+android+phonesPDF link annotation

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