Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fa7cdb4484ab6d…

MALICIOUS

PDF

73.3 KB Created: 2021-09-15 19:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a7fcf3dd052713208c5680908d683668 SHA-1: b6c50d503d22e2e9961127102ecd804e6b757b4b SHA-256: e2fa7cdb4484ab6d86d9eac55743e43eb9f8789407469b7578a223eb6a426262
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

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://archism.ru/uplcv?utm_term=bangla+voice+keyboard+apps PDF link annotation
    • http://colantuono.it/userfiles/files/68915798366.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/39e96e6ed37ae1e6e49abd24b087152d/lesuxiloletemi.pdfIn PDF document text
    • http://mweb.cz/images/file/56364918949.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/7320428569.pdfIn PDF document text
    • http://novastal.pl/userfiles/file/96920208952.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a7503c44a---levuselubenowazowe.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/22423842389.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/13172340972.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/91996040215.pdfIn PDF document text
    • http://centromp.it/userfiles/files/fevaw.pdfIn PDF document text
    • https://brianspradlin.com/userfiles/file/95177958752.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/maxinof.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/daloxubajuvuzedibi.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/zunuvowugamarelen.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/70681449616.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/libuwodogupudaw.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/jeduxigibowo.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eef2b63a31---95251508190.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f275890888---jukede.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/70050430011.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/wavevikudisatozutetijal.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/wabojeruvurunojufitadiloj.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/19905687739.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/sorida.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/b2ctt77lhm3ce2bc8oe4fru2t7/27937655442.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/1538368369.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16141719c575d9---degobeb.pdfIn PDF document text
    • 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_off0000d54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54F 18352 bytes
SHA-256: 6fa9480b01952aa75340fda548a499264e6b39e55c962981790d137eaa0a8378
font_01_sfnt_off00010509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1