Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b93e12173902c5…

MALICIOUS

PDF

88.2 KB Created: 2021-09-05 02:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bc969c64086e15cb54effeacab9a3a6f SHA-1: 5877afdc284aaa28ffe54f4005c37148e4dc23f6 SHA-256: 45b93e12173902c5c13ff4c878638c8606b8917016bd1cb88522819b053d0e6c
176 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous links, many pointing to compromised WordPress uploads and potentially disposable hosting, suggesting a link farm designed to redirect users. The presence of an IP address literal in a URI further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://arrayamed.com/userfiles/file/89523975794.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4a2bc3e68---rorabelimatazexawubo.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd16a4cc53---40503176049.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/bimexuperujudepelirufago.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/262fcd24308bb47a8b49bbcf3c0eeb0d/zidazebaritebo.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/fp0hmkfl6c2opr5tuve961kece/19443873202.pdfIn PDF document text
    • https://promise-land.com/upload/file/siturije.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/zobisa.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084ebdc233c4---83210482507.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160caedfc9e37d---votemopozelomeki.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4feaaae67---96770460098.pdfPDF link annotation
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/nitufenetoke.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/66959847376.pdfIn PDF document text
    • https://europartner2.pl/uploads/90652025535.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754ba759d15---99324310394.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/suvokazepaxepivezapenuva.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b48699912---segobifixu.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8e1bd565d---60546170461.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021080915505788.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/11159906746.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/niketepesukoda.pdfIn PDF document text
    • https://banghenails.com/upload/file/51218028948.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0d238a5dc---gedaxira.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b370ddca1---94990823002.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=definisi+radikalisme+pdfPDF 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_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 10532 bytes
SHA-256: 88529eb79a62ea8ccc72d833b2dcd606b491e8828b0ca952d92a057f55fc6e79
font_01_sfnt_off00010ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD4 18692 bytes
SHA-256: eb3c5060eae8503ba66ad69b1b1608509562499475a43d5dbd8069f121ae2692
font_02_sfnt_off00013b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1