Malicious PDF — malware analysis report

Static analysis result for SHA-256 314cd719446c7b75…

MALICIOUS

PDF

54.1 KB Created: 2021-09-06 13:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d9379780adf3d6d64daa17027cb730e2 SHA-1: e791a7cd9e74954f8db0bd327bda8264c64eb80f SHA-256: 314cd719446c7b756dcfd2c35a570170f5b31808345866942d243324cdd9e270
154 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous links on disposable hosting and compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8185

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://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/l9goj3j02sjomsm68s45tb7ito/80002047893.pdf In PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1087d3630af7c574500d3a449ead7803/31642772681.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210812165513_6whebk.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/31668156824.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/34e53eefaa7c70c453209a381faab55c/rigonapefugewumiviluf.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/lipijomibupagopu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f680d4737---zapatujulogajobavawud.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109052210042530.pdfIn PDF document text
    • https://campermagazine.tv/public/file/77555230517.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/45103961775.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/pojizuvelabozejopuvaf.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/15529059891.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda1067876a---juvuxi.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4370ca7fa---2461360370.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/cpo52e9sqmmr3e2hqbb9del0dc/77385225220.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c433ed51d58---gugumunubebin.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/gitixetupasanulakedusizaf.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/jejitomakuxaboxufewonak.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/12810610114.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/lojexodega.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/xosozasuk.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/maxivobosabivineba.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337b5f427be---seruwekemumu.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b43330718f9---gumuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=following+directions+worksheet+for+middle+schoolPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB578 14832 bytes
SHA-256: 794db10d5d206edddb08dd957825e27456d61ef9d29d864202a8eca1c2c7e4f9

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