Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e63b3a2fabb8fed…

MALICIOUS

PDF

111.3 KB Created: 2021-08-22 03:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d0c6a7196cc3afb49f975c1af8fa69e0 SHA-1: 887663e6e9951a8aefc903d07c3ea78e4d2e0288 SHA-256: 3e63b3a2fabb8feddf0e4c521b5df5ca1f27bb0c5432843ea802d50694a3d67a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6879b0a03a---duxizokojapapanunufakuwa.pdf In PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/38c1049805371036c2d3aa645afb52bf/12632312443.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/lumoxudifipajibeb.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/xelokekujugeritekuxif.pdfIn PDF document text
    • http://thongthien.vn/upload/files/gixos.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/poluzanoxuwukeko.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/87524863147.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611a336e8bcb7---57809126153.pdfIn PDF document text
    • http://andrewsexes.org/clients/867461/File/juvivunonemabido.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/mugarutusenegepag.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080917f3969a---jekeburinadagipazadetiwem.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/42419680602.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160eca406f1d63---gejogedorikolif.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/87316844329.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/xibuvavokutebego.pdfIn PDF document text
    • https://chp-travel.ir/data/file/sugos.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609104a9d7a4c---27372995533.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/qrbegdurht4dg4vhdn1qa6lr7u/nibuzixatogore.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16ad5c2bd---37117717543.pdfIn PDF document text
    • https://digireg.nu/upload/24093448321.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/laxesewogoke.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/rexofib.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bd4f1cf80---71567257213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fores+new+idles+in+skyrimPDF 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_off00014ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF1 10416 bytes
SHA-256: 14e55ddb8306cfbd526f56a7ac8709fe7976fd54979d4cac614f19c5027b7be5
font_01_sfnt_off00016787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16787 18136 bytes
SHA-256: 1f3f1dbd5b861ce495b57e673bae8f7378535c787cd23dd9953e785393ce0483
font_02_sfnt_off000196ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1