Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a88fc32b5613db…

MALICIOUS

PDF

84.6 KB Created: 2021-07-18 09:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 56e440c82c26e8c35e7005b7db779560 SHA-1: cbe7b5c0d5f6cb0042f38095080693a3a3775804 SHA-256: f4a88fc32b5613db7dc15a39c5e6abb28b916f6a2cf6e14af6c1d873b3707381
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs further supports its role as a lure or distribution point for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1eb7c1541f---17820653209.pdf In PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2759d31c---35687592040.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/bipepotevorikomu.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/papozawulixogasagabaruwig.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aec4f807f59---kudixijomebezokotexiri.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/kivutatawudutobudujipuju.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/vuponogo.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/87190392203.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f1727d2d3d---nisezowovajiru.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc228e6535b---72633420681.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/562b5a25e81f7d573d5e1dd032cdaeff/49025402422.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160845c0b438e7---rexusutolag.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/piledalogunexufon.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/8068dace78a32ea5a3d6607bdf72aae9/9405508798.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2621c010cc421b080f48ab142faf6116/bibosun.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609037d1bb5ed---1271925142.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/dopixem.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/83922838507.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/gisebezije.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16078f9eda8c19---13058172069.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/e6237ea760ca45e385a3f24d38305409/86055619098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=reignite+meaning+in+tamilPDF 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_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 10108 bytes
SHA-256: e5ac8e3e307603babce62cd664108ff98b3f532a385fecf864a34a982956b5fc
font_01_sfnt_off0000fe33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11645 19168 bytes
SHA-256: 09e3c57d0680698231fc74d8d758629dacc8bc2943405949af2dd84b2297fa1f

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