Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e01278b3637ab76…

MALICIOUS

PDF

80.7 KB Created: 2021-09-03 23:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 31c26418e42c38361121b200ee4b6465 SHA-1: 78d613e2ed4613fde115a0d526cf9ec790af6f5d SHA-256: 2e01278b3637ab765cedb2fef2473b513bdfee8a9ba7278639549c56fa77ae0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/06286e90df55f7672ab72d5bcf421548/sajitolajawunusanelun.pdf In PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7ab016bf847986f51bfd4a631724e9a5/16762129231.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/26345682300.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160af6e5a5db66---robizabowedinoziruzaj.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/vofefebogikawinuzix.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/11526427645.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/27041747508.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/fogubisuwisim.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/777a9d609d7af832e3a878e0fd383302/gozisujarojixez.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/20708482352.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210701155139_681073902.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/sepavijapizujinojitarox.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/lodavatejuxirovofup.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/jatifezame.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d52546156d---gegizexuzuramuganakaxuni.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/66467264347.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/18562182536.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/suvodaninakasepupu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/e3b16861f13c6c6994a5889fddfc64a5/vukekis.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/7594837783.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/30243452092.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/kicbuoh082l1hs2u7nq752vdb6/14136387387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=marxist+history+pdfPDF 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_off0000dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 16440 bytes
SHA-256: 236d391b04e77e026641972f18b5cc16896ebe4fcfda15c617e1ad73911d5565
font_02_sfnt_off00011d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D10 10520 bytes
SHA-256: 8d2e9a5115d6b8e01a51b21c7b5270fe6e6f859442fef9163d65c8c5dc6eb518

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