Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3eb2efb89aaeea…

MALICIOUS

PDF

75.4 KB Created: 2021-09-05 05:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c8851fa02ec4105c5bf47f1ed8c170e9 SHA-1: 04631a5eedab9989573945852f03ccd373fba4bd SHA-256: cf3eb2efb89aaeeac8ab6dc8b25ca9663f28513eb76605528efc1241d2b11274
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, suggesting it is used to distribute phishing content or malware. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=geronimo+stilton+volcano+of+fire+pdf PDF link annotation
    • http://podwierzba.eu/ckfinder/userfiles/files/90111025331.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/90737057451.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/mojupegarosobuxipagopowa.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/jetaziwovakixisurir.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80680ba27d---delepefotixusidewunuf.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbfc0c20cf---gavazeluwogufivosavomi.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/doxen.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/7d2f11ec2f9573fa13a56550ce74680e/wezuvafipavaparike.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/10790358798.pdfIn PDF document text
    • https://papiratisk.cz/soubory/nefumufijigofiberok.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e273a56f9---10447744357.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/renifefekafodevig.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/mexabojixupigejegazugob.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/riwapufonatefixaj.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/gidepesinub.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832858d7670---51464260747.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/soxeg.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/16596d4f589d41bba9d612acba431293/34101724409.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210802145131730.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/0f7b3a122ad87d78e80916e3685e8763/resovatogi.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/82a02ee150027f0eaed5e9988b53166b/28450870467.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j288r2dh3ug9qe2ft3o6u3d3f2/92902456761.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9adb8675fe---39196540711.pdfIn PDF document text
    • 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_off0000c13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13E 10888 bytes
SHA-256: fc0fbd60a4409bb170b13c96095d277c1243a2744dfb64cb2f428b3a74417e9e
font_01_sfnt_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 17516 bytes
SHA-256: c22e530ed4e2ad4b125bf87965f3ffce1d71b26f7b75ee0c309061ed6b400c0a

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