Malicious PDF — malware analysis report

Static analysis result for SHA-256 11be967b8446fde1…

MALICIOUS

PDF

89.8 KB Created: 2021-09-08 09:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5afccba27ce5c5af41e3d01ec22ac633 SHA-1: 51ed50eb3c5663338168e65b928c2d2995a70e32 SHA-256: 11be967b8446fde1e18cdcc1c22fa03b91beca301577cf66c78ce773bb09b9a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to potentially compromised CMS upload directories, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://mednet.mk/public_html/upload/userfiles/file/jijunobisexotomefevi.pdf In PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/katamejezivopudibelejolo.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/27139919138.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/t8cr2okmgs6s1lfdd25802nad7/47444760456.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3592d0374fe41964f272a3199c66c0e6/vanazibakuwaxowabivigol.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/gerozusuzizage.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a70d3d3b3efbcccca473a1b861e78e23/15234693171.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/ratepobodaropuresu.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/lotusipikinafulojefowo.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/982f059793e0df38439f6186451d6827/13632008731.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/5c66adb050dcac01797d3f883bd48580/lunekavuwujagevimu.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/89953669686.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/41892297129.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078fad67ef21---lipiwamero.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/zaxunotifujab.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160721cb698b85---69388091879.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/lujiposoziw.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/lizip.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rurunozinogegaxuzeberuni.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/lekajefowuzanekike.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827aac7b3a2---bumadevofawumoginapokig.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/rufuwugatasugotevavilam.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/zabixuxivevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=nta+ugc+net+2019+syllabus+pdf+downloadPDF 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_off0000f838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF838 17520 bytes
SHA-256: c15c71aa78f0b7e88a3e515998a9ce467df8dc725559cbc381c920334254193d
font_01_sfnt_off000125f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F7 11480 bytes
SHA-256: da2797b132195f238921e87acbf6c148ac557de36828c0c29d1ea973eea5ae63
font_02_sfnt_off00014114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14114 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1