Malicious PDF — malware analysis report

Static analysis result for SHA-256 965853a92facf3b5…

MALICIOUS

PDF

153.2 KB Created: 2021-09-05 17:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6fc902f8b2b583abaccf757133867147 SHA-1: 8c70218eecb21b85241ba86ef3829a14a42c14b8 SHA-256: 965853a92facf3b5c198d1194ec7e52be14622be635fb691c08866150dc8373e
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. The presence of numerous unknown URLs indicates a broad distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • 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://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f43d5b0a30---lufutubu.pdf In PDF document text
    • http://sushiloverca.com/uploads/files/87094910177.pdfIn PDF document text
    • https://scalping.ir/data/files/file/gewudurunodazexe.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/dd075b984819a21c8cd4acec5c4c2dd8/97771962647.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/32cbe5c813bda9364fea8acd650bebae/takesipogof.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16078038eb61a7---3899959448.pdfIn PDF document text
    • https://sim2007.com/files/vanipegoletomuzose.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/g135jpmkpbiupodl576m5o9kdt/xolixasabu.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/82612314576.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9191aa10---naxopezobijuvaruralif.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f5db6dc9---mekubivo.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160819741d86aa---80099191761.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/39623228041.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073d7f82081a---jovuguxijutafodug.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5ee3673892c3653920777e4c2bda0843/17021941839.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/80440936040.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/3891799864.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/40731114456.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/89707958849.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16083883290b59---kajififutadatagenedarebod.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/80384013889.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/mobukaxejegoriti.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/062112459884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=tuhan+agama+hindu+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_off0001ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED12 10344 bytes
SHA-256: 3eadc9220d5ee6b447845bd3071021b019df2d1c955ac36b14205acf667e2941
font_01_sfnt_off000203e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203E0 22728 bytes
SHA-256: 71b6fa32211f5515b4a764cfd454350dacd9552e91b2f76aeb6163af3cb3b394
font_02_sfnt_off00023edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23EDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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