Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d02d50eaf048145…

MALICIOUS

PDF

87.8 KB Created: 2021-06-22 13:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9495f375cdf5e37fc60543d9a17f3e9a SHA-1: 04e58b409b24fdb80bca55b703f43d55fe2edf40 SHA-256: 1d02d50eaf04814535ac9098d6ff53b2592ca4a1c79984958989080a9a2916c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, suggests a lure related to Microsoft Word, likely to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/2c437c4f29aa6574ffb0064c4a0cc50a/11058321994.pdf In PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/90580843436.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2d73afd9---ganizumizatejipuku.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/wirila.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58d97d05b---32225465235.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cf6ad798a---29059196762.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/jikafupiwikotavovazewawi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f851ece4---65519600505.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/722122f6221c7ace1abb0c33b925a4da/faruwanegezebomimize.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/748626857.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/98201030967.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/rusakud.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160983c2c4c9b3---xitetaxunewud.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/wineroxalamos.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2a0b73b6103fa92c595473b78ed1561/buxokukukosuj.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f9480c8ee---xevomeberufi.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ab0c470b25696fc406edee1e65b1f152/56952296655.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=como+escribir+una+palomita+en+wordPDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 3196 bytes
SHA-256: 8d7eacc1effff89f5398612a85d0beebfb58615251e47b139e21ed3f72c56bac
font_02_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 5356 bytes
SHA-256: 09ccc717418571a6e4b49422c7f4d2fb8a7254dd1e0e5d474cd9a9d8b858a49f
font_03_sfnt_off000106dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DD 1692 bytes
SHA-256: dd9dd108fdb47b2157c8faa8545c9ecc60501ad66ecf44fa6b13185b49f91c09
font_04_sfnt_off00010f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 12404 bytes
SHA-256: f6b6cd629e7195d12d1edd810e5997e1ab1f1d116d0238062d385ae40befde75
font_05_sfnt_off000137f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F1 16584 bytes
SHA-256: 09ea6b340c3a8633117e4828b8579f81601e4f6b6576ef1fb115b42cf57e4a94

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