Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d732a58d285c40…

MALICIOUS

PDF

94.0 KB Created: 2021-06-30 14:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5e9f32e5aba05e0c40b96a93f3fea3c0 SHA-1: 77ab3394ebcafa22d6d38e3f0271da641cdc4c55 SHA-256: 55d732a58d285c40114b338f519099bef8966359dbf72ff7fb606bcd3b10fdd8
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The file's structure and numerous links suggest it is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6447

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://camile.vn/wp-content/plugins/super-forms/uploads/php/files/qmt82fqe2o2b72vvepk5ri9m0a/pikogufugijamelumawo.pdf In PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e12660a5cb3ff87eb79af95c964f10f2/89447859980.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a736e7e791c---soxuvesen.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/33922e7595e95abc0fda53379673372e/446348309.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kerawinuz.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08c1c50fbb---mukufizasakom.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/tajigumozinofen.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ceb3b515a1---32829833655.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/gewapa.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b350dc2aaf---19735764130.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/bifodubomuwobifivubenog.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/xurenesunolubefomosa.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5babe17a2f00037649d34ed1da79c946/68963944506.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc480ed152---pipixazafaxamipom.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16089b2b66f12c---42699056320.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/kh632uj6lhb7braklpqesu5o58/54892591225.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a2140353---65913691768.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/xefakun.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/ratazibasogexajotije.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/rexomaguvot.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18ad743df---duvemusugux.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/5dbd735f73db564b8c299d2493a55d8a/31657257305.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b9052bd6a---95688272050.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/dasikurukagitodezomugate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dua+to+protect+from+evilPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001246c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1246C 22644 bytes
SHA-256: cab5cbd10f7610bf36843ae2e76ae36e1648ac43b64402cfffa0c63fae8fd777
font_00_sfnt_off0000f665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 17532 bytes
SHA-256: 911d903fc28225c8aae0d34080ba7bd853fded5dbaa242dd75d30c78c6ce6f58
font_02_sfnt_off00014ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000164be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164BE 10536 bytes
SHA-256: e3f68def9718dfb0e8995087f82632297132a313d06042611f068a02c2ad8280

Open this report in the interactive analyzer, or submit your own file for analysis.