Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e0b450279264a1…

MALICIOUS

PDF

81.9 KB Created: 2021-07-25 20:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8dcc3b1a793f90be049a5c2ba533744 SHA-1: 69781e1645001e9f52f82aed65b73cc2fc991085 SHA-256: d0e0b450279264a1e5dcf091ba8882a46a159abfd42cf12b720a21fc2ea5d2b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure align with common techniques for redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/9e67d927d2129bd3e697773b0129f8cc/68174904724.pdf
    • http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/sujubilituvudakuvedew.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb43720009---jidezinonifu.pdf
    • http://bortran.com/upload/image/file/20210608073715.pdf
    • https://cicadit.ro/UserFiles/file/87172325448.pdf
    • http://ruoumoc.com/upload/files/posexikixetazivawa.pdf
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/67403053945.pdf
    • https://torgradio.ru/new/files/file/64376032142.pdf
    • https://glaze-metalart.com/upload/files/39045672827.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082485d3abe0---77266003723.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce297bca56---muwosi.pdf
    • https://aashianarealty.com/file/39192294474.pdf
    • http://yule-sign.com/upload/editor/file/20210704070059.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/5402fa4e43778fa0a122031a3cebc28f/72075774646.pdf
    • https://studiorampinelli.com/file/23570040830.pdf
    • http://coffee33.ru/archive/file/mexesezokokanakibimunis.pdf
    • http://thsport.dk/ckfinder/userfiles/files/wajunedubud.pdf
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/27539420112.pdf
    • http://kingcraftviet.com/uploads/ckfinder/files/38788482752.pdf
    • http://cdmvt.cz/sites/default/files/varegida.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e47000381---zolajejarunu.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e5bfb5fcf48c461c519b910665c8f667/55352122056.pdf
    • http://narcisse.sk/editor_uploads/files/kujozatirasamibuv.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609790985b5fc---kenafilegoriditi.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031c6ba953---suzuxofaf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=kaththi+aathi+song+english+version+lyrics
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1f.bin
ec9f864f5e3a4899aae966daf9b83a080c3325a7dbc66b47aac29fdf075693e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 16960 bytes
font_01_sfnt_off00010828.bin
acde4737b0b31ad72f1b53d2ebf273f9184aa0c10c251ba068b14f8629f8d2a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10828 10680 bytes
font_02_sfnt_off000120ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120AC 16792 bytes