Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e281d5b6329c62…

MALICIOUS

PDF

68.6 KB Created: 2021-09-14 06:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 50e2eb56efae2dd64779fe3797cf08e8 SHA-1: 580ba0f921c530eba32ce7d26c0dde5ebee66301 SHA-256: 36e281d5b6329c628af9559c54aa18a1fefd35d6ff8d519bb5c81c6b4eadd948
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many of which point to potentially compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting an attempt to obscure the true destination or host multiple malicious files. The presence of embedded JavaScript, flagged by 'PDF_JS', likely facilitates the download or execution of a secondary payload. The ClamAV detection and ML classifier further support its malicious nature, pointing towards a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://renknh.com/ckupload/files/mutokibidajume.pdf In PDF document text
    • http://eltdb.com/UserFiles/files/20986548843.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffe49b3f8f---62419365631.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/53152741139.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/xodologazafuximo.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2ef29850d---20948528139.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/66278933841.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/46941479464.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/19779825681.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/nofujobajuluwoxazeterew.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f10eb717c0---48426193888.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/petopegekival.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/92343892019.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2f3be7733---posetedizigeribojixiruder.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/66058201992.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/28983785498.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/welidigilipevo.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/nelixojugubat.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/vigaregipenupeluno.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3d4ba8de35ff55f9cb9cb62d6b2d16ce/tudofukedukeku.pdfIn PDF document text
    • https://bientannamhuy.com/wp-content/uploads/files/nubufiwolupazu.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/9098559136.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/juxovuluzawebojepit.pdfIn PDF document text
    • https://mahae.hu/files/files/48682210015.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/29485976787.pdfIn PDF document text
    • http://anninh247.info/upload/files/93370786903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+bully+androidPDF 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_off0000b241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 14308 bytes
SHA-256: ed604d819624046d0693e9ef5e1e0efe4592d53992224c8f83e319d53c73f8d7
font_02_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 10284 bytes
SHA-256: acefd27a5765c1b1e8c25c8c78ab6397bbd6f8082ccdb5a3f936c225c019a6b9

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