Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b40a3f9733599f…

MALICIOUS

PDF

64.0 KB Created: 2021-08-16 03:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 941860e8460620e7ddfebc6917737d45 SHA-1: 5095f53173705bebc4d1ac89d0320d8d4be7d667 SHA-256: 03b40a3f9733599f6da3b969e2235ca430a65f8758eefc368b6c02c3f97951c6
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

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://pantryscan.com/123cars/imagefck/file/tufadi.pdf
    • http://shangrilayunnan.com/ckfinder/userfiles/files/5155172890.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/afee6481eaa81d930f028edd4a9c4cde/zusefavovedufoxamof.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/kcv0co8jbq1m2uqr2e2f75grhk/88342746932.pdf
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/xilebuguwiwolesilisiwodet.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/71b20e96a03e5594b8f300e97a834593/44753136181.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/5f1d3bc9bd24c859c15695e978e3280e/vugebokejovovodezaruwul.pdf
    • http://retrievers.su/ckfinder/userfiles/files/xojipilafiv.pdf
    • http://rhodeislandalpha.com/clients/56223/File/93669134465.pdf
    • https://alohasafaris.com/files/3864878026.pdf
    • https://apoiotelecom.com/imagens/img_fckeditor/file/vojaguritiv.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/171cf17ad9400bfdf52a72585401cefc/72937821401.pdf
    • http://arcomproltd.com/userfiles/file/namupifiwotoditop.pdf
    • https://contabil-fiscal.ro/mm/file/tiwexogazuxamane.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/j7lmvrl0d9m3qc8e84m1c6b382/lupupuxusixewadisukibuniv.pdf
    • http://logo4you.dk/userfiles/file/50109648480.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7a0d7df58e4674fbb1d2d6e8ad88a9a1/33434939591.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c317f5ae1193a1038880c1e8a8387446/rejufe.pdf
    • https://hyundainhapkhau.vn/upload/files/35885264435.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ace19909604---26592913238.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e327cee24e---79374873715.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=warehouse+management+textbook+pdf
    • 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_off0000d950.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 16792 bytes

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