Malicious PDF — malware analysis report

Static analysis result for SHA-256 1229407c0d73d7af…

MALICIOUS

PDF

67.1 KB Created: 2021-08-28 02:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53d908fb4d0c4723e42e1ee596fbe127 SHA-1: 2538435f84aa37be1e83970ad39f3ba770742691 SHA-256: 1229407c0d73d7af1240a0cc1e147cac7d7e35e024be012e930750f5e1677a1f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains. Several heuristics indicate the PDF is designed to host a collection of links, potentially for phishing or malware distribution. The presence of compromised CMS upload links further suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://belloverde.net/emailer/file/28499298159.pdf
    • https://konteshamamotu.com/userfiles/file/5508952502.pdf
    • http://apexibd.com/uploads/fck_uploads/file/nexatukuji.pdf
    • http://vitalbafitnessclub.eu/userfiles/files/kafofabowesa.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16105dea483325---fikiragaz.pdf
    • http://banghetretunhien.com/media/ftp/file/torasikanakibofatidedure.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/83072bafcac212aeea012d35c47f1e41/telapog.pdf
    • http://massarentearchitettura.com/userfiles/files/pokezidupazivixuxi.pdf
    • http://yesilderecine.com/admin/editor_resim/file/vutudukaxorodaxe.pdf
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/binoxamedumi.pdf
    • https://exihomes.com/userfiles/files/72301339659.pdf
    • http://kaies.cn/upfiles/file/nasuruxilimuw.pdf
    • https://pharma-tools.eu/galeria/file/gulivikaweli.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rklldo985u4qki7e4a26us2p04/mafatetamavetuj.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/625b283f1d76404d07a4d41931431342/48994297729.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/0p7dc7sdf2hubkm2qmci4eo3lf/16192563350.pdf
    • http://apismorava.eu/docs/86780536764.pdf
    • https://dudikom.pl/userfiles/file/zupudarupetowiniv.pdf
    • http://arisutour.com/ckupload/files/tajusoxitasisetitujusodez.pdf
    • http://studiocalcinoni.com/userfiles/files/64227496276.pdf
    • http://kaies.cn/upfiles/file/43726551635.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b70cb4b49---58044389610.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e3697f0087a46b13b7975dd87b75a373/8327246806.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=produces+the+most+organic+water+pollution
    • 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_off0000bbad.bin
f2e09856e87fae49a38f1ec8193c136700a5f42fceb5998fc0bb7cb618cc19ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAD 15532 bytes
font_01_sfnt_off0000e339.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE339 16792 bytes