Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ed92d2984ddc71…

MALICIOUS

PDF

74.0 KB Created: 2021-06-30 23:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d118f3b394af03064637f42397c4f031 SHA-1: 1436e5a75ea244ef713dba7bbe5cfc880580289e SHA-256: 43ed92d2984ddc71c140ff34400fa7b6ecde46eaca0517304cd5230574210ec4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The file's structure and numerous external links suggest it's designed to lure users into clicking through to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7520

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://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b493a41e0---2822540964.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ba451c30---jiwavet.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073c38d4dfde---88540734426.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/abngmh97i4n2e8leisnucbtfs4/31286030252.pdf
    • http://e-hane.com/files/18952494254.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/mc9d1vtjg0d3app864efjtvqa5/78368815055.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/s4q4duel3crp48rac3csmrb532/40015592261.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb7c91d67f---rupigogawedolizigitisebuk.pdf
    • http://sotel-perm.ru/site/file/87720343832.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/289cd6189d9f35118b9e6d5e5dba509b/98196350919.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c60714c6f2---14256852467.pdf
    • http://www.deewanalarab.com/up_imgs/20240563127.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a6277c1f5---bakorira.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28af91901bc870f7ec3da805e89ca167/74321666642.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e0d92ea77---2666762732.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/64d3885c4ae016ef5f75774784214f5c/wawetezebudowexetifor.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa01125834b---wiwojoteberam.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e73a71b8e118736186e1117d417497b4/jowojevidapowevusidab.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f47e5d9505---kedukagipogakumosupofa.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160aff943a47ca---bifojapomimedavi.pdf
    • https://avigailpekelman.com/sites/default/files/file/xokesoju.pdf
    • https://eyetracking.pl/userfiles/file/jekukexodawerine.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/83656657063.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/iis3gm2vjtoekjgohtvsjl50l4/39620445924.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=importance+of+philosophy+in+daily+life+examples
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa81.bin
f5833de850359dac7c101fe9685da9f175be00f166ba844dddd1035da4290b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 16820 bytes

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