Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbb7ca1c7f9a630…

MALICIOUS

PDF

99.9 KB Created: 2021-07-08 02:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c320416462a58b7774f431d367b304f SHA-1: 1c1a3d01959e6728a66d2746b6bab1dd009a730f SHA-256: 0bbb7ca1c7f9a630a55596fc6db3fb8d21226a5d22a9820041855dd12863cfc7
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to lure users to malicious sites. The PDF's structure and the presence of many external URIs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1386

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 https://eastmanllc.net/ckfinder/userfiles/files/tibusizumumiwop.pdf
    • http://shuswapladystriders.ca/userfiles/file/77792789626.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1ee2111d7---xegugiboxedizuxabekibota.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/7pamnci8r2o1qi89o8i2nj1t25/59800748301.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821a1db6757---dadokopob.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d3161a282---97268154358.pdf
    • http://iphysiology.ru/upload/kapuridigimujuw.pdf
    • https://kaowei.tw/image/files/20210703_201923.pdf
    • http://getem.plfiles/file/fisewupuv.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/gm3t2lun4g2rqeohehqc3u10o5/6642066737.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/g16n7pdvjsd0esdpokrm7akpk5/zozutejanirame.pdf
    • https://avonsteel.com/UserFiles/file/5166869891.pdf
    • http://ciccioinpentola.com/userfiles/files/54966812339.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/4e89e9357c971f7606225095ab1dd675/vetij.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/298cb37f7443eb57ddfc4beabe4dfed0/30884740777.pdf
    • http://vetcasatenovo.it/userfiles/files/nujajuk.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2fok6vnr775qp4qnqk0v72isb8/wixojafuwutokoz.pdf
    • https://keralahappyjourney.com/ckfinder/userfiles/files/71514306590.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073a701363be---wotuvimagunobekij.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71b6a7fe2a---69854788621.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/87565cac3633e2b201e30af5e44dfe44/26018971565.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16085a09076c8e---23708478355.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798b13a9351---refowovi.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ef56c650ed55038c2688fa2a4bb7a28b/73102986306.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=what+does+sip+mean+in+spanish
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000153d1.bin
46a25a5c05816b3927d8f04bee0e416c5990eb466524e8a617fe3bbd4256b7bd
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x153D1 21912 bytes
font_00_sfnt_off0000f02e.bin
d64811ef9525a2f39a72d90c545ebf2ebe9f79cb92d7833aa53b22a9d478f8c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 10504 bytes
font_01_sfnt_off000107e2.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 3464 bytes
font_02_sfnt_off0001155d.bin
d0059df7217ce70a00d8ec7f9c65f107307898291d61a98c05377e72e09bfe68
pdf-font-stream PDF embedded font (sfnt) at offset 0x1155D 25516 bytes
font_04_sfnt_off00017a01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A01 16792 bytes