Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc29ce4e090f0c4…

MALICIOUS

PDF

93.2 KB Created: 2021-06-28 02:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3893ea59f6cb61f0888d4113747c0c95 SHA-1: deeebeb811ca5c9aae8859acfd5ca1c63d095e94 SHA-256: 1dc29ce4e090f0c466a8cec73822f4460b090924a65259380de63290e0a07cd5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content. The presence of multiple external URIs and a link farm structure suggests an attempt to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/5cc3a7dabc5af15b1264b91e57de3960/jigidupubekogipaxiwoxinu.pdf In PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608096f38ea11---18007663171.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608bab7cc276b---59251919987.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b90aebb0910---rebiminonigir.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083f7c590377---desesi.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d091b6b35---xifitof.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1024ef47843b018077d5a4928fd155f2/9327718170.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/31432423076.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/21657612980.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/2ff3050a5c4085718963a2e76456378d/fixamefubejizez.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/roxuwowegewamigiwotol.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/rejunufulatinoro.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/34183922772.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/momefenedosikatalorume.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/58575797072.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d23eaab4---3541439331.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/nijix.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/wijuzalibizuviximajonid.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/wirib.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/01231d5b3ccf9603d71260eb4c063a14/93383737329.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9869372a4f---jezepejiganununewimoze.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/40941003892.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/68e3b4f87d8359300f63c5aea83aa4ce/nunofovofilonu.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081a473588a4---wulimunelub.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/rufof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=gotthard+stay+with+mePDF 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_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 10600 bytes
SHA-256: 90335511d8c62c9672fc354f8305b21368cf667b5da6cc46de1e17d6d92c30bf
font_01_sfnt_off0001207d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001388f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388F 18012 bytes
SHA-256: 5f293f8be314c0f7f8577e4856de36404610e414a0ac95a629196c1297bc63c5

Open this report in the interactive analyzer, or submit your own file for analysis.