Malicious PDF — malware analysis report

Static analysis result for SHA-256 254e2d3f8ae128e8…

MALICIOUS

PDF

86.1 KB Created: 2021-07-25 14:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 91f450bffa30d5b7247e2d0775488b70 SHA-1: 40be7ae0c404023f18703f9feaf009ad96460014 SHA-256: 254e2d3f8ae128e804035c7530592dd143b3d74293b6bccd8406afdcb0c8a0e1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ruiguoex.com/upfile/files/2021/06/03/kewiminokimazo.pdf In PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/2a72619d1679ebadfe6278dae120bb26/xobetevilifufetumenofewit.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/30873005615.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dc69a34600e---sonifujajunifisiv.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608324bccca20---72099543574.pdfPDF link annotation
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78095b9e3e---zomulone.pdfIn PDF document text
    • https://songhongresort.com/img/files/dalobaxafeme.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14de37a63d---68263704554.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d54f561cc8---46796047630.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f3ace60d---94074893087.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/dufisapopulep.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/3j3boik7pd6fc9n916co5pmrr8/sekeweredogewijenavisam.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/g4hophmd4a6qct00tnfb5g4igc/mepisofuvarofalusofopof.pdfIn PDF document text
    • https://memoservicesrl.it/file/93716337439.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/womogu.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/22493403916.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072f947da313---62836935389.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb31bbb951---kepupamatexofofotafa.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/df1f703cbdbc2a957ae56fba082a6bab/34478572659.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f4bfc1a7a2e---86320914188.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/xanivojitajiwikapakuzasi.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a7dc40906---vetekegagiw.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/5243256163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=history+of+modern+art+volume+ii+%287th+edition%29+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_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 11240 bytes
SHA-256: fb9e74f5dc84ad25ad6b830ae20c13d9c1549ae37438bc0519aa581ac6d5d34a
font_01_sfnt_off00010563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10563 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 17204 bytes
SHA-256: 01b17797bd4347ac1f5914ccbad4b2c8d7f879d31adc38e7f9aff27cc11d9fb5

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