Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e9a56dee4540f6…

MALICIOUS

PDF

100.2 KB Created: 2021-07-27 13:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 42a452f3e0c2b8194366e74f31bde457 SHA-1: 704dff1027cdd69fdf96ef40e5ffe6883a6a2154 SHA-256: 08e9a56dee4540f6a6c2f811ecba280d9bd285bc6e734269b7752187674883a3
156 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. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a4e3e5b800693f7785a649f28a538e4b/1002031300.pdf In PDF document text
    • https://quatden.vn/webroot/img/files/mosugowosabolasowovo.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/88012634708.pdfIn PDF document text
    • http://mosjob.ru/images/file/xemofuraxepebajilosife.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dac2c81ee---98139854812.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609815a9af469---jasedu.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7a2b1b0e---wunebukovip.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ada9e9e32e---94060427641.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8931493b98---gofajiva.pdfIn PDF document text
    • http://sns.hu/_user/file/47952705539.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/98a6ada6e310ca6dd8ed685d7954b9df/91992332104.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/5780277651.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/82159879112.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • https://clifestyle.net/uploades/userfiles/file/29745321043.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/vaxelulologosufamaxorija.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/rc7j7ng7bn3geisq2354fr2c5c/folozimesa.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160836ea1a749e---42295314963.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a929b712613---tizariteluxuninikegagurun.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/52296189268.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6d8343de6---12463774294.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160c860967c228---74488521655.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/0d2d8c257bf6e26de2af6c23e56a29cb/97288048825.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160889d9b68dd0---33886923733.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/84254453306.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6t5f2i5gujmtgf6ojsnhqkkvc7/tuvonifoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=red+lobster+lunch+menu+saturdayPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13836 18756 bytes
SHA-256: e9d6f2e302b2b2b05dce6f3a117dd277cd24e86caebeaad9b575d9a26e55fe75
font_02_sfnt_off0001685a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1685A 10944 bytes
SHA-256: cf6f55d940d32fb8b15008fe56c4079dcfcbd1a4829df62b251a2921fedcaae0

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