Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e30af6e89fd42da…

MALICIOUS

PDF

70.2 KB Created: 2021-09-04 11:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cd8480004047fc83a7b53f6452bb2456 SHA-1: af41cba30dbf6bb92354b1db3895ce0900b25fec SHA-256: 7e30af6e89fd42daf2861338b30dc185d1e6f821bf5138b115c67b57a9ee9497
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating it likely exploits PDF vulnerabilities. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of a link farm on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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 http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e441d5dce7f---47975404489.pdf In PDF document text
    • http://0930actress.com/files/files/ripitoginaboselowelamotof.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/bevipamilob.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871853d0213---40322128426.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/lemosutasedariziwevi.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/8387322162.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/0131a78c1b715112b347aa2c70b0296c/tofufufajajesulax.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/11467423549.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/31871269268.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44f4e3a1d3---xogugusikezomuxexem.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/15851708606125a367de91d.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///9401505593.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8051fa4c823e8bc62843865acc8f1be9/49265279557.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/22978753807.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/92f8c27ea5b3bfb020bcb30e52a6db5c/gobir.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606cda26b03c9---32781447164.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a590cd63ed62ca3b24f376dea72cce59/jevuwumetapuk.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/896a9478e0912c70802461fe87a3bad1/7478065300.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e606cc170c9---55149850053.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/bonudawuledobejuf.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/fiseta.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c05515e5f3c---kilurifedilalet.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/19630076753.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=shape+patterns+worksheets+3rd+gradePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC485 16692 bytes
SHA-256: 83022e3a5acbe47a4e1e5f51c93da279ae8fc1bc980352b8320710556decd0f4
font_01_sfnt_off0000ef4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1