Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8a13cc1f0e499b…

MALICIOUS

PDF

87.5 KB Created: 2021-06-28 01:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77264d4b2b2700a3e1189cd6330f9c90 SHA-1: 43618665a5803f5b0c53e08317650d92c6ef13df SHA-256: ad8a13cc1f0e499bddc730544a48feda081e224e520761ebf6208e557fdd85ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ajansnigde.com/resimler/files/56938823405.pdf
    • http://kingsfinancialconsulting.com/userfiles/file/mexewodupinaj.pdf
    • http://hart-metale.pl/gimnazjum/userfiles/file/kepop.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/bjdlcp6n7cpnhcj7gs45rm2h08/48441012131.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/d97fee30ad1e83ba78ef1000cc3984a8/taniwirenajig.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/6a82adctfs2rrtik752nriv104/44449111494.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/cc1b27d6db678b229b16e03f20b583e3/simelivetinelapavev.pdf
    • https://armandofalconi.net/userfiles/file/vefogasidotinusekuwer.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608db4ad3a967---dezekitisopomowegururi.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091a4c6b82da---87656841863.pdf
    • http://k-yoga.org/file_upload/spaw_upload/file/20210623030342.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6601d7cac---ramonakan.pdf
    • http://ampletrekking.com/userfiles/file/14426922786.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906382712a4---ditusamopumuxupe.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086babb08ce4---36138035936.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160946c4734fbe---31408129579.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/a83aabace4ff89752a08bb1e8ca5b6e2/gofavojisukinelinedufux.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/ee574758c9bb4fbf3ab12d78126dfa67/fopipe.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a18df0d06d94ded89aaf76debeeb0c23/retemiretapexotipob.pdf
    • http://austral-immo.com/userfiles/files/94915518867.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607db9df92002---15578116846.pdf
    • http://thingsantiquesla.com/userfiles/files/60154096008.pdf
    • https://senhewood.com/d/files/zejoduxinusisogavuwinewiw.pdf
    • http://ersatzmonitor.de/userfiles/file/92701800571.pdf
    • https://audit-advisers.com/userfiles/file/ratosiba.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+3+day+rule+dating
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f048.bin
195a16b5370adeafbe1570304a89c9fd656e9ff4cfeb4b59fbc56ab96602d984
pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 18116 bytes
font_01_sfnt_off00011f9b.bin
a0f12d9c36979a1c2c9a51918f719367d63c344e935c0dcc13a8cf11651838b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9B 10588 bytes
font_02_sfnt_off0001378e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1378E 16792 bytes