Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2df60aee7700cd…

MALICIOUS

PDF

77.7 KB Created: 2021-09-02 23:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0be39caa2fe99b1732c09191fcff6c9f SHA-1: c3ae1152ec26701e82f466301b73a60cf5059340 SHA-256: bb2df60aee7700cdbe52351b4863c8cbe138fa4fb7f6d5c86ab9f164b08bb6e6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The file also functions as a link farm, pointing to numerous external PDF files hosted on various domains, some of which are identified as potentially compromised CMS uploads. This suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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 https://phatgiaolongan.com/upload/ckupload/files/tulufi.pdf In PDF document text
    • http://batiment-tunisie.com/userfiles/file/salewidevifisazadapiw.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/91247667463.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/77047051343.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210502062909171.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/13368148016.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f34b2cef0---bonenu.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/73141376346.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/gopovuxibesiraju.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/zufixiperejodevofazutus.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/dofexur.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/gavuvupaxawabixali.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8faa106810---wolowovunodadujegowutuvox.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/87474793151.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/rumoxobum.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa338d65839---88190473747.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/badazokonoxunatetot.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c31d99463---tobiruzekolomis.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a32bbad1d4---2211118851.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/ruxoga.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/82247554656.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6790a2ad7---50327944148.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/fugulewuri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=percentage+word+problems+year+5+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_off0000c7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F0 17896 bytes
SHA-256: f19fabae4a1a9e3544b84b3a8ca39b2f834d12fbc3dd0674b309dc2bffc08ecc
font_01_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 11344 bytes
SHA-256: a608f77c8342f803efec4d5c86554cb37741bf5b41429603d72c8063797846e4

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