Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7d2de2bbc2d19e…

MALICIOUS

PDF

83.3 KB Created: 2021-09-06 02:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 860387f292834068f2bb45bbf0d2aecf SHA-1: 0bfe80c03b8ac629be6d80e106a4bfc3f658a168 SHA-256: ec7d2de2bbc2d19ebb3a2439af9579cb9375df4c14bba3d4bd09e5bf38509852
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://damiel.eu/userfiles/file/42816965715.pdf In PDF document text
    • https://saatyapi.com/upload/ckfinder/files/99427818249.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/45288211474.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ffda365c39d071c12be5de6ec3b97ed3/63756741645.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/7nsho7q2tmh55ia9007su3ikoc/29968966723.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/25324053667.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/kinozowexatakimuz.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/40728634409.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/24037165000.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a1ac28950---movosebadividenedupafoz.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/64914264468.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/xajelefitizes.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/ace47fda2ef1ffa931c9da8e44675b97/zibolurogafilaxefesopoz.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092930bca46c---pejalugudikexomepewum.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/rizaxuxali.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/90122084914.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92cae6eda---faxopebifi.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a1286e934---38358499349.pdfIn PDF document text
    • http://cutskytools.com/d/files/25560064302.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/nerefafawolaribop.pdfIn PDF document text
    • https://avvocatoboretti.it/file/46138956755.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/31686760279.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/ce4a144ee06e2d03692246831e68194f/mejinuta.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/dimakazodo.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/62929676285.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072e188dbb5c---gidabenatogilimiwukumufa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=php+to+pdf+converter+linuxPDF 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_off0000e0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 10656 bytes
SHA-256: 4ae96739c094e45d06e11f9b57c7c58fccc926896aef8ceeccc8c9cd844470f2
font_02_sfnt_off0001110d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110D 18068 bytes
SHA-256: 584f00a41f07c129f5b42fa367080df82fbccc46bf3f61ef256bd8bb346f02a9