Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb647710e1b34226…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 03:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cff835c59ae0f6237633b6c942bc3958 SHA-1: 84838949f33f33d58e02de2ccb78350214ddc2b3 SHA-256: bb647710e1b342268927ca956a82e3e38bc97ab0c442281e1fec0354336e7ae9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://prodottoitalia.eu/userfiles/files/noxenenizuvugepikajasizi.pdf In PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/de1d7853f82c415431cb1f56156651cd/53029551833.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/26911411317.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/40b74c96d9d8c1be4897a252f08a449d/36704830822.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/xorawitajexazibelosaw.pdfIn PDF document text
    • http://wohingltd.com/userfiles/35754444341.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/17081535957.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/30222938422.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/2972622296.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/7482825707.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/vizizesixotupufozuzova.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/aa979eb80c34e54b92c585fb49040b0e/xifamabawu.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074c25a64fff---rubibotikabofujefewopoxe.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/foxuloku.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0defd2d119---zefifisokadufumesekoziw.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/73867749950.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/fdf7a83115a794125387cae4c6a63817/13026819428.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/netizonogisuvuduwipo.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/25c933b7b7b9fed4a313f2f05803efd9/mavunugewik.pdfIn PDF document text
    • https://malikcolsys.com/userfiles/files/botevufotopavesaradebugu.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/1788c6a2f358f143816d51eb91221127/6220281477.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/34813084754.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/sibulinanetekumomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=in+the+heat+of+the+night+season+2+episode+21PDF 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_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 17960 bytes
SHA-256: d44ab68155039227b9ec81016aa4bf473760d48ae1673603f616984b1c95a7a8
font_01_sfnt_off00011223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11223 10752 bytes
SHA-256: 3787ae6a7088e906bd9fabaea650387e3897a0a49fcea0ad4d7966747182756f
font_02_sfnt_off00012ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1