Malicious PDF — malware analysis report

Static analysis result for SHA-256 7195ea1af2c3d767…

MALICIOUS

PDF

91.9 KB Created: 2021-07-02 20:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e134b225a0f3d7e1d80865fe4275469e SHA-1: 25695341d8505fea378ec39069ec703332c43058 SHA-256: 7195ea1af2c3d767d1112f731987c1166a516d47c110745017c893ae94386967
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to download further payloads or provide sensitive information. The file's structure and link farm nature align with common phishing tactics.

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://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16093d614454d4---jonigiwutovutida.pdf In PDF document text
    • https://sasalidayanisma.org/uploads/file/mowozotebasopokifake.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718380c66b0---jujitavi.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/beminevajasa.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/cbcdf6d20c9bcdb8b9f2d95c26f3bd29/sudaxujuwe.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/83909994609.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bqd8v641vqe91f82coj3mv6t14/povopapomenazumixigaligop.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079e1b943f13---57868211793.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dce36a2c7e---3605906364.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a3bf5aa12d3d398e55ae3668761bb05f/xewejemebaso.pdfIn PDF document text
    • http://iworking.vn/uploads/files/kefivomasatitosa.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/jd3sqb8s29bl0f4j1eb7i3g2jj/vobaloka.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/95870598970.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/56884209983.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c3f6af7bb---jugowaja.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca3341bf7---76533807613.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cacb7aa53a9---4786314961.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/juwimipafip.pdfIn PDF document text
    • http://timapools.com/uploads/files/pojofifubozaxezo.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1131847ca1---61315290042.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/vemexonemupapodeg.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/4743657707.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/4oo9eeh9fe2e4g11t041eckr91/wijufar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=motto+in+life+as+a+studentPDF 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_off00010653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10653 17136 bytes
SHA-256: dd06aafafeccf5f9bd88ad57c5d76d9adddf4efe31f189a1bf30e5988f58930c
font_01_sfnt_off00013315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13315 10340 bytes
SHA-256: b742880fd37c86fc9063067432758ee203a126c2728388db0f89cfeba14472ba
font_02_sfnt_off00014a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1