Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c198d5156ea19e…

MALICIOUS

PDF

78.1 KB Created: 2021-09-08 17:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8145bc20c1fb4ce9407c857313385eae SHA-1: e5cc007f2fb6dd6f8b240b2dd7a64f2bd3a7e56d SHA-256: d3c198d5156ea19edda2721dd820a7d23386e239c8147ec3d42c54e6c071fba8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains multiple embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to host or redirect to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ae224ec4b489e3533a0c664f890dfebf/16131404263.pdf In PDF document text
    • http://amdind.com/userfiles/file/50938414084.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/sukugokabufuzofi.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/nimuxuve.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/jidafupifulakejedis.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/4c16a6c2fda8fd823d6f27be89178d35/30922331842.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/30382419683.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/bikojakujarazisumoxiza.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/jitoze.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16134ef976e1b7---9987426282.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f63743cf97---gagofaxodag.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/66322027949.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/71453819894.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/13602180724.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/pojawusozalaviga.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/narexefarolulikak.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613512fbe617a---wodizalizafodagapij.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/hp6pesvcu6nm6qd5se3fo0glif/65040775802.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/9969846399.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/somapamex.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/161366b8297046---83600487467.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bb575fbb7---bidapiwirugaw.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/fugokosa.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/4562386632.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/mijuzepizugidi.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/36441786382.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/kugazopekasobodom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=waqia+karbala+pdf+bookPDF 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_off0000c9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C0 19072 bytes
SHA-256: 075b5c6b26a606c12a48896d94d21cd105266b8ead66562f2ee4d6c6ad186ef8
font_01_sfnt_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 10360 bytes
SHA-256: 2d61a6bce4fa636b609ae474d572908e4bca1afaa49b2578a5b2fdfd07da2985
font_02_sfnt_off000112ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1