Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5475d9ba2cc19ad…

MALICIOUS

PDF

243.3 KB Created: 2021-08-03 09:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2cac34282bd911937628dafc9fbc2d70 SHA-1: 5d98ab231e1b8c49f309f1398623164dc80c7616 SHA-256: b5475d9ba2cc19adcc6d02157d0e3a6e8619d251c0efedbdbfcdad64965dc9e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content. While no scripts were explicitly extracted, the presence of numerous URLs hosted on compromised sites strongly implies a malicious intent to redirect users to harmful downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8767

Heuristics 5

  • 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.
  • 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://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bba0ea886ba---910914818.pdf In PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/76887560702.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/22438345083.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/wutimolijujamaxu.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2fe55cba0---fetozevuwozuj.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/1822049696.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/detewezimoxego.pdfIn PDF document text
    • http://dzbnf.com/upload/file///58330610836.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078707c34543---wiwotifuxirexan.pdfIn PDF document text
    • http://yejida.com/userfiles/file/lafat.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b326a91668f9980d1298e649597dc2f7/48151122334.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/od7g5qiunnsvldrj945cbbb416/robuxogatawegakepi.pdfIn PDF document text
    • http://taiwangallant.com/uploads//files/202107311018589095.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8eacf3f98---figoxivorixopixexusad.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/lkmso7683iu7c3k939f24dp8ke/xuxegipixolizepor.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f0b3e37e9---32294174581.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/watajaf.pdfIn PDF document text
    • http://c-six.it/userfiles/files/7797954077.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/lopuwijaguvulifitiz.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8a64dbfe5---linodapixigo.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/sakug.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/99909444374.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64957c9d98---mukexabukisitogamidet.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/97478465784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=c+by+discovery+3rd+edition+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00033817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33817 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003502e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3502E 10928 bytes
SHA-256: a605363125763e92ef7eb22d95379619f8a66fd4b167afc10090638f1b1f1d0b
font_02_sfnt_off0003697e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3697E 16544 bytes
SHA-256: 3417d74f8ac839628d72c4cdba78ad222142739c98ef11f42bca84c509172e3a
font_03_sfnt_off00038099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38099 25600 bytes
SHA-256: a86ee1b86c08c572bafaefaf8af55f11bf271339b3a7f7597127d39b13ca621c

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