Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ada7c5586ed7558…

MALICIOUS

PDF

84.9 KB Created: 2021-07-10 05:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4782523460c61b6d953be921ef54f4b SHA-1: 2c026f2aff6764a67285e05cea80de659d59b33b SHA-256: 5ada7c5586ed7558c0a33a6ec6c4a592190f4f8768f594177d0f6c242a065a5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085626452d2f---pitabefuxawelirekanuvo.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b0c064f750bb5517ef3427b17ea03c9a/mopisabudapupadi.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/istvtllldlfb199pr0blhid0ou/zadexirafasebafotoxe.pdf
    • https://vivekanandbawwa.com/userfiles/file/pumerotufovumin.pdf
    • https://feldmann-spedition.de/pics/userfiles/file/80350847226.pdf
    • http://visit-pune.com/userfiles/file/guviwav.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b39c03ba---21379939438.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01ec81f328---peforal.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad490e83c---sasofugoxasudafodibimalin.pdf
    • http://palaciodelosnavas.com/userfiles/file/35491442964.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/fabexasirono.pdf
    • http://studiotecnicopinto.it/userfiles/files/74259935675.pdf
    • http://accessiblevehicleservices.com/userfiles/file/53804661735.pdf
    • http://nhuaduongnhapkhauaz.com/upload/files/10171735742.pdf
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/wosafa.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720b3f73a47---zuxakax.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd246f1ccf---wegijapikosix.pdf
    • http://nuocmambason.com/upload/fckimagesfile/82ae47c7d29659b7629cf449d58467e7.pdf
    • http://yachtandgulet.com/userfiles/file/86643432708.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c08df9d0a3---65602244506.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/2eo6ugft6a5kae4tgvj4e66i75/10724945468.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=hamada+of+japan+reservations
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000c6ba.bin
9229bde5e3614c940ebb387a6affb910e6b09cdb82f6b0ab59768fbd23138caf
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC6BA 16244 bytes
font_01_sfnt_off0000dca1.bin
5aa9e66b7f2399a6895e203141a6c56acd87c598eee97841dfb2067c83862e92
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA1 2252 bytes
font_02_sfnt_off0000e685.bin
b3917d5d9273c7247942b9efbfffcd8e7642e815a5bb547a141917d26dbbf61b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 17572 bytes
font_03_sfnt_off000114e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114E8 16792 bytes
font_04_sfnt_off00012cff.bin
de72e4a1c842b8cc996a42d24f6cd0c113771b15875334bd07c16548354af83c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFF 10800 bytes