Malicious PDF — malware analysis report

Static analysis result for SHA-256 720d709a7f40e92d…

MALICIOUS

PDF

89.0 KB Created: 2021-07-13 19:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dd7131a2ebc5c22bc5340cd8ebbf3f50 SHA-1: be63252580b0803a40b43e3a225d34bd449fc950 SHA-256: 720d709a7f40e92d4735af896aa620f1a5e5775dbf6f5c3c7c4d383817eeff37
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of embedded URLs and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, potentially involving the exploitation of PDF vulnerabilities to execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://amursvoidom.ru/media/files/wagajuvi.pdf In PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/a8726prdges91s1ktplcsqmkp9/47641041542.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/zebazu.pdfIn PDF document text
    • https://globalquestconsulting.com/userfiles/files/81922231533.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/90684244447.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/70c94ba059212ce9d2ce3c0e2f9d2fde/tamezijenikamikekajejuno.pdfIn PDF document text
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/85172663082.pdfIn PDF document text
    • http://mdc.ir/ckfinder/userfiles/files/dewopigunaxovefujulom.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/dojire.pdfIn PDF document text
    • https://ancoraeducacion.com/images/15243320157.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/vogam.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160728f54b5f98---57094297833.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608dafc7be85f---xesigedexirilisexewemukij.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9cabcac74---7043786683.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082191cc025f---24438377470.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/9816655048.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebf150cd43---36137567394.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48eaac7f74---kuwitu.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/solajuzubogumilenonaxe.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/e3df69ea30b8cd156feefa503ae2c698/36495148932.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/6fe4c54d3b437e6b3d0e3b2908e8652c/dufoz.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202171384119174.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b77f4cfdd---kisajaxude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=best+laundry+hamper+for+college+studentsPDF 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_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 16680 bytes
SHA-256: 4105db4cf6a357dc2f4546361b94e5bff0e85f165000939d877d49d9f141b49a
font_01_sfnt_off000124c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 11244 bytes
SHA-256: cf382d4f891366ec99e8ec5e44bc14d9d74cdbb4d9d62677ee9520094fb50670
font_02_sfnt_off00013ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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