Malicious PDF — malware analysis report

Static analysis result for SHA-256 965ff5661f5f5120…

MALICIOUS

PDF

80.1 KB Created: 2021-09-04 01:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 230717072cad6379efaa91d52c58ce5e SHA-1: 9a2ca3e62f89994668701eb728854759cc853ca2 SHA-256: 965ff5661f5f512060e128696dbd3e6f96fe93c7f8948cde9701c3114d8b2c66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://jeanthompson.nl/ckfinder/userfiles/files/xotejuwelijegezanoza.pdf In PDF document text
    • http://hagelkonzept.de/userfiles/file/xubolomirixitedapokodo.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/bapesulumagemapedagiwobus.pdfIn PDF document text
    • http://savemaxint.com/files/file/94383904868.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb2e389628---nojekudavegino.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adf41f0fffe---vojatopolevud.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/53782274770.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/zotevemifax.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/kakevozuxegurimufobiki.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607242ba2970f---zesativagezatefokag.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///73247166609.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/kifusanom.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/6000594100.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/15885250099.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/36670709536.pdfIn PDF document text
    • https://tipresentoio.it/images/file/boboputaziwopukajide.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/fiworalamexitaragipom.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/de05325dd7f0474c5c88feb2eb9f72ca/bamudakusemovebaliludo.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5af4b20676---bokotejepagexumebinerere.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc6d35873f---sogavisomupereweganano.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/forunikotarewitevuzime.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160729006682af---75918358333.pdfIn PDF document text
    • https://micsys.in/userfiles/file/mafejonazixikipuxizugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=especially+vs+specially+pdfPDF 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_off0000d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 10356 bytes
SHA-256: 9cef3fddefd1766697a0930f92c0752dbbc1d3d90f83968ea98a9b4fc71c036e
font_01_sfnt_off0000edc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D8 17388 bytes
SHA-256: 787c991a51b67ea975ad646edef6c9a6efce893e30e27f653265753ed3a648c5

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