Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc18d62b4970d449…

MALICIOUS

PDF

58.4 KB Created: 2021-05-11 08:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 892e2bb350e77b1721abed5b1c24c95d SHA-1: f3792cb32b049aa0c4b4f2f5f6c8248d120e80fc SHA-256: cc18d62b4970d44976ea505f9074abaa42b52c4c341956e801809373957a9823
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were extracted, the embedded URLs and the nature of the link farm point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8841

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://wastran.ru/uplcv?utm_term=transformar+grados+celsius+a+rankine
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607150d247768---17545025956.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086816f5f095---dagetojanubojawivuwebib.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a42682b59---wagevoreji.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/88aldvcnhqq22j8n9e70kde4p3/wijedobakusuzanet.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094590682bf8---motiradudanixigirivite.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/982650h99rf51emt7nflb61li0/puwoliginaxidotod.pdf
    • http://adance0112.com/upfile/editor/file/sasewusowubowonejo.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/54378668426.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703567bf270---19920273596.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082ece4ea9e6---rezofosumoxeminofujo.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b3f37b9a95816bd331f848b5172a62e1/sapugexusonar.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/76137989fa80837373f29b0feadf0c32/mamuluxotaxivenedove.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f34177ab04---52345251825.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b792b0c644---lefekogumawunarexadu.pdf
    • http://alexlunacoach.com/img/editor/file/zatamozunijo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc00.bin
b438afb9c4c6ee183d550fc84d96963e2471e89bf1d89c346bd7e2b3fa944921		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 5356 bytes

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