Malicious PDF — malware analysis report

Static analysis result for SHA-256 8517008fcc26c8f3…

MALICIOUS

PDF

72.8 KB Created: 2021-09-01 03:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fc234dd7d8d9175c21085899564c3b1 SHA-1: 343fcb6585b488961575e424ea571b24c9fb5f57 SHA-256: 8517008fcc26c8f3d8b54ea85eb8644cc8536e3996999ddb10a3ede8b4402f11
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URIs and the nature of the heuristics indicate it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/22b890ae6e5b51c7f1981c971103af5e/kirobabodajuvuwezotut.pdf
    • http://marinapogon.pl/upload/file/sarufowerifo.pdf
    • http://888spirits.com/userfiles/file/sitisamelad.pdf
    • https://zivotzaokny.eu/res/file/23057880816.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee35ce7937---noxesanapawenetulag.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/1f13740dc777fa5bd5bfe9b3b9469c57/kenesogu.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609abfc5a925a---25280731666.pdf
    • http://myconnect-thailand.com/image/upload/File/zebidaxofipawopi.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4b45eaa30---voxevirewumagiwenat.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c74293ba1d---46806712845.pdf
    • https://yildizwebpaket.com/calisma2/files/uploads/50170578389.pdf
    • http://ladue62.com/clients/2/2d/2d0487a90c18d3a1b3df44839405a665/File/foraloginabewezusapa.pdf
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/28290929976.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077e1ef96201---ziwanetuxipijuregun.pdf
    • http://157.230.241.115/image/upload/File/pakusomoxuremipetupi.pdf
    • http://smcertificationservices.com/userfiles/files/ragab.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160928b7a6efe0---remosaxuvotekusetomurusa.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d73266c6d91---9483917963.pdf
    • http://zaiger.ru/img/file/vepano.pdf
    • http://arndt-fahrschule.de/userfiles/file/92776621660.pdf
    • https://aymsoft.us/aym_image/files/famabid.pdf
    • http://poorclarescork.ie/images/68622704086.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=domestic+violence+act+india+pdf
    • 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_off0000bce8.bin
ea8cc9f747efd1981fbda8946e6d190e0d487f757a6bd2c31f8f4f0c7cdb2dfd
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE8 15784 bytes
font_01_sfnt_off0000e52e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 16792 bytes
font_02_sfnt_off0000fd45.bin
93f933f925959d2d55fd89aeb0e7655ca1f1b301ddec70ccd426eaf2e4ae5f7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 10748 bytes