Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7f1cff4d1afbd2…

MALICIOUS

PDF

109.2 KB Created: 2021-07-22 21:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3e9acf8acf4c1183a81382df4fc85432 SHA-1: 6e498598675441840f100c92ab001f66ee82d38b SHA-256: eb7f1cff4d1afbd25b3fa165cd270c3032bcab624cbaeaaf0489c6aa6f77239c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

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://eminencesolutions.in/resources/userfiles/file/weruzuwekejokuvulinub.pdf In PDF document text
    • http://ajarnveerapong.com/UserFiles/file/nisopobu.pdfIn PDF document text
    • http://mwcapital.net//ckfinder/userfiles/files/48712055810.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/97117623288.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094deb07e895---43207626911.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be5ee8c957---zujakisanupegawado.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/vojifidami.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/sovitugafokasapowikaroz.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/jimapiw.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f64da42a9---5390514063.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/dakikojawosibumebejovib.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0f816a2a3---datikarizadanuza.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/xobonejekeletemabutodoma.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16086ddb8f23ee---877674350.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608040c11e3f5---feburoj.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/95044120577.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/bfe5a95a22a946071a1bdf7e937134e2/ripojojoz.pdfIn PDF document text
    • http://bostonmentors.com/userfiles/file/85165008018.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0372750b6e---zekopimitobo.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/28152128735.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3rucppcge0fvr7o7h9kfudrf6g/35407023765.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/wumef.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f4bf031f---detigew.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/sojamivikejasaj.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/lpts4tv49arfr82qd3islsqato/53434361047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=spider+man+far+from+home+123moviesPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12045 19348 bytes
SHA-256: c321dbcf35d0672b098e14c7d831b6e32ae01bfb327fbef6fed5a386e9100af0
font_01_sfnt_off00015388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15388 1784 bytes
SHA-256: e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb
font_02_sfnt_off00015be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE8 16280 bytes
SHA-256: d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515
font_03_sfnt_off00017209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00018a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A20 11104 bytes
SHA-256: dc437ee436c91dc908ccccbab694f9a6fa39a107cda417fb1a1e69c6a5eb0324

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