Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e9cee9e11bad4a…

MALICIOUS

PDF

64.0 KB Created: 2021-07-22 23:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c137d08f9e66dedbfc765dada93a1fea SHA-1: c816530783b1d5ffb9574b02ae7ff0f323ee2478 SHA-256: 06e9cee9e11bad4ac6d924601932f1da786a59562eae372f20dfa5453150cc21
154 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to compromised websites, suggesting a link farm designed to redirect users. The heuristic firings indicate that these links are hosted on disposable or compromised CMS upload storage, reinforcing the malicious intent of distributing phishing or malware content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9609

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dfbf94c3e---5172317485.pdf
    • http://eortak.com/img/fck_temp/file/lakalojixise.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/91be2567577d3f0bde8276a917cbdf3a/7816741353.pdf
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/12318438132.pdf
    • http://nhatminhtrading.vn/app/webroot/uploads/files/dixafabagefogevuk.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727b0cd7fdb---2954926812.pdf
    • http://appletechsolutions.com/userfiles/file/7459564501.pdf
    • http://e-hane.com/files/javivejulibokagazuwo.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607248906e451---35429155761.pdf
    • http://sumtinathholidays.com/admin/uploadfiles/file/17030554407.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/2267fd08918c8889e83e754deacf0908/jemegono.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f1757765e70529579f45adc2023bd97f/89760681528.pdf
    • https://imotrading.com/images/userfiles/vajiduxavevopi.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608155f06c8c1---75734955825.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ec72a2631df50f52ab79fe59e62a1f58/79102805961.pdf
    • http://domeinbeverdonk.be/assets/files/file/tiwur.pdf
    • http://lapenya.cat/imgjovesnaves/file/49421487998.pdf
    • http://saokienviet.com/uploads/image/files/lonuruxuzip.pdf
    • https://bushregenerators.net/userfiles/files/64673935252.pdf
    • http://waltwhitmanhsclassof1970.com/clients/3/38/385e9ad2c098ba3bcab8db81b262ab1e/File/29077858690.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=space+st+peters
    • 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_off0000d1e5.bin
cc896548780e253a1268784aaed9ba414c75f75a0bcc34bb2d30e8dbd2ce7c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 17348 bytes

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