Malicious PDF — malware analysis report

Static analysis result for SHA-256 80934785280fb3ea…

MALICIOUS

PDF

81.0 KB Created: 2021-09-10 23:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93452ed59d8d28203db266dc4c0e5de4 SHA-1: 1fadb4862ce5288f2d369e9a3feed549f3a12605 SHA-256: 80934785280fb3eab974a1d842880b2754e1ae6abd91dbf0697211050015b913
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. ClamAV detection and ML classification confirm the malicious nature of the file, likely a downloader or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://pixomot.ru/uplcv?utm_term=what+does+a+custom+os+mean PDF link annotation
    • http://chinawin-consult.com/userfiles/navona.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/34049044380.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/masuzeruxo.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/8594247797.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/62521877952.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4c4a8b718---48307680562.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/muzuboputedereritubebe.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/43049389841.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613629b83f7a2---bamewurijixege.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/falagen.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/gapebanonuwotefu.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161380fba3ef73---16600018260.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/1582817079.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/18543991018.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/31358691018.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/nobebofejawusowufugij.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/sugagojoxetolamet.pdfIn PDF document text
    • https://fptica.ru/images/file/vaxorenezizagube.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/fuzozo.pdfIn PDF document text
    • http://sin-hua.org/userfiles/54573269452.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/9037780593.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210903193654.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/notovisosatefexazuwowoko.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/7e5bfca43cea9bfbb3bcd31f4a516bc9/92059299031.pdfIn PDF document text
    • http://exima.kr/userData/board/file/35212108216.pdfIn PDF document text
    • http://hanleyresources.com/images/kulesemovafejikipego.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_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 16992 bytes
SHA-256: 335e2edf28886b81de68c0584b1caf13417e7bbc28289ed35252a0afa12d9a56
font_01_sfnt_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 10492 bytes
SHA-256: 3e01601ce8a26d7348bfa8fc545cc75e8d9602875f145d21c6cae94c3156554f
font_02_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1