Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcaed07a6e529dd…

MALICIOUS

PDF

120.0 KB Created: 2021-09-03 04:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 84373da8c5c1082da08d12fd69a686a0 SHA-1: c674df6c885f1a4b5946bc767be4b48918274cb9 SHA-256: 9fcaed07a6e529dd846fb18690d09055af21e921a5cfc95287d330a40742cc5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs point to potentially harmful PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ab3449c9a---rijemovarinimi.pdf In PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16119d92822124---42783194575.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/94786062834.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0997d76c1---madajomorejuxapabog.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/67471420551.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/f82e6eaf1e1d2f9af6bd07121708abf7/30020846643.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/52184984309.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e0159a47604---dizusolezalidax.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e811c5a6a3---mulegofujitazofize.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/54337090488.pdfIn PDF document text
    • https://pindimana.in/uploads/file/sadelaxisepuzazekaligumep.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/berogotupotiwedezebo.pdfIn PDF document text
    • http://flomojapan.com/upload/files/naboruguzovapagilav.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/90077058433.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/38694509774.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/lezakuxotiguko.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/89912651214.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16072f933ac0d1---56281173142.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/26008710837.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/93460734531.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/69601842424.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/nivotasijuronubire.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/lebib.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608b924c648a9---munopoxamujuvenumarede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=hecate%27s+fountain+pdf+downloadPDF 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_off00016566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16566 10724 bytes
SHA-256: 19192ebf80b093e7daa854f7c7cf8175cd83e8739ce805cd7cc6f8e720ecf104
font_01_sfnt_off00017e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E33 22880 bytes
SHA-256: 6bb4a69146aff0ae4e58be2fc0023eea93c43c5b8ecdd65fa23fcef5fa800134
font_02_sfnt_off0001b866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1