Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0805657fb36824e…

MALICIOUS

PDF

88.7 KB Created: 2021-07-21 16:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 425d9f75e2428a1fd959282326bfbb8a SHA-1: 53bb305af60d5fa343644cf65db8047941e21380 SHA-256: c0805657fb36824e1fffa72af06a21320864aabb94b26245bfcacad359608ed9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate the PDF contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9545

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://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/18312571390.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a132dfae4efbfe9897ad6aebb101d650/34426507335.pdf
    • http://bannhuaduong.net/upload/files/vitemi.pdf
    • http://opusbiz.kr/data/editor/file/116662288260e94ddfecdb5.pdf
    • https://gikguamerica.com/userfiles/file/ladazewezimoravazarutoj.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c235b330ca---19038635585.pdf
    • http://splogservice.ru/content/file/57154794858.pdf
    • https://heatingboiler.ca/fck_upload/file/bepaz.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16099aca4c0720---gegiwejemogovapota.pdf
    • http://brette-animation.com/userfiles/file/11732144585.pdf
    • http://www.heksan.com.pl/file/wobebulemowetemugafuziva.pdf
    • http://ilkyoukais.com/Images/Media/files/gipunob.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb70784e91---54903938112.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5470838c72---16633683273.pdf
    • http://clingac.com/d/files/65790748266.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607838ed2b660---zejawukovomumileramadu.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd16042f4f---nigorozerof.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/jiqgnnmqmim54jlaohshtk21je/mezovufeza.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716049005b2---miwiralokufejotafi.pdf
    • https://xpress2.eu/ckfinder/userfiles/files/75953149599.pdf
    • http://hayatteknoloji.com/webimage/file/82279403069.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc3a90f0dea769580cee331cfda9225a/18267999691.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9dc1a60d---poros.pdf
    • https://doosradashak.in/ci/userfiles/files/kamanukoxonogeferibodivo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cdt+map+new+mexico
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012860.bin
a784fd30f4ec538ccf8051fdbf6c0b674dc711b2df499b0c9316d2cae5c11536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12860 10580 bytes

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