Malicious PDF — malware analysis report

Static analysis result for SHA-256 01dca1195ba85678…

MALICIOUS

PDF

74.9 KB Created: 2021-07-21 18:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12b295f943a0220059e7d86031fba89d SHA-1: 55750f9cb7cc98cc84c18c9039a7ab166c104042 SHA-256: 01dca1195ba856783f0e98cb0914a39ca81becd9562494403cd76bce9a8b3d5e
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The document body was unreadable, but the heuristics strongly indicate a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6966

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://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb86c68186d---diladujevazipujo.pdf
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/64122253476.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-1/20210501211603456430.pdf
    • http://amandamaitland.com/images/file/32038142159.pdf
    • https://gachbinhduong.com/upload/file/nosetam.pdf
    • http://tajesink.com/Uploadfiles/files/45228063701.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/xoseguponomadojofar.pdf
    • http://amctop.com/board_data/editor_img/file/202106291655.pdf
    • https://aduanaldelvalle.com/userfiles/file/mekenonodu.pdf
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/ponamimigavufedaxapexus.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/5ae09736993e9315c61dcda4d75a5d9a/jovobanexabowiwavitapi.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fedb459567---99388420352.pdf
    • https://pinkrali.com/calisma2/files/uploads/92056893406.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607132af6ce2f---98730080116.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160789aafdb69f---2121945768.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608010dc4e763---24011547450.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093e6b248a6d---gogonajow.pdf
    • http://adbuffalony.com/uploads/files/51300936385.pdf
    • https://morganmethod.com/ci/userfiles/files/xaxekupuzifufesuvezunema.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/dd6c3f0c5f822a0b999f65c343235081/maxefozisonupitifevu.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/f0b50624363003e8cd823eda629b98d9/jaragubexoguku.pdf
    • https://iringmalaysia.com/ckfinder/userfiles/files/difesoxesipi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=two+body+forms+of+cnidarians
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c6.bin
00a7e5d0bff5b83276a21c471f43aba7c4b0e564270984b4dde7e4b513562366		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 10664 bytes
font_01_sfnt_off0000fd42.bin
64309d0f3bc2c6c3e3c920972bcb7d37d4ef25a0d5df8ea96a7716188c22badf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 16620 bytes

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