Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2293e9e1579302e…

MALICIOUS

PDF

83.0 KB Created: 2021-09-03 15:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7b1e3d2280ce65b3f771c3fd3ae03db9 SHA-1: b74e09ced8b46a2cf36627415d94414522379058 SHA-256: b2293e9e1579302e4e8c74eea6665f43552c3c1efd19cc4262881cc605159834
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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 https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/q4fbnk8i7aef4slrmaa3iedj6s/nugupofijogadit.pdf In PDF document text
    • http://ebrinteractive.com/userfiles/file/61774335643.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a39aa9ce3c.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/88fcd5be600a7b57ddff24265913f9e1/25121918199.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f4862645a---70729548065.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/lesuwavuzapa.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/ddc22319ceb8d85338b6f4a2fc0e54e6/45332002187.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/aht60beu5n14uqc7lubsr8bo16/tebowuvedina.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/rosalonosasaxepoxukijen.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210903080250.pdfIn PDF document text
    • https://lusagroup.mobi/images/website/user/files/viwafegin.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4eec94610---71086620294.pdfIn PDF document text
    • http://dnepropress.net/files/file/51247225399.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082190dbcacf---jixajamizidopolun.pdfIn PDF document text
    • http://philboyd.com/2757901261.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e46b5101---30418088040.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/49899c74d221d4430f0326888eb85655/wevexifefejetipaforivuve.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ba3dc47be---ginivu.pdfIn PDF document text
    • https://magatek.com/documents/file/14243565238.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/mavagug.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/5159395892.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/xabimowuz.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98a5c18f7c---fezisisum.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d1466a2a4---famupusipejapopavuvugete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=royally+yours+emma+chase+pdf+espa%C3%B1olPDF 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_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 11056 bytes
SHA-256: aa85dd6357c08998226c61eef7646a7727a3a3dc8c66cc3a0b779941e41db585
font_01_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 18700 bytes
SHA-256: debec32a9854abaecaecaf8791557c510705b2ba7d4ef3973b5a60254c83bee5
font_02_sfnt_off000123fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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