Malicious PDF — malware analysis report

Static analysis result for SHA-256 630c9ace9f4970ff…

MALICIOUS

PDF

85.2 KB Created: 2021-09-08 13:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca00cb6822f0ea8ba0ba7d1a4c6ba005 SHA-1: 30b6a0923ba955bf268b96cf21e72651a8cc6d95 SHA-256: 630c9ace9f4970ff5ec972cc2573972cae61be4e07c06ee96c9ccf5b57497731
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://argyleliquidations.com/userfiles/files/bakozik.pdf In PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/zugupojapexukalanemo.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/1b4c03223be8f996e49056083cfa5802/32258613583.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613662dd9628d---72790557151.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-3/20210903225119896985.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613057b44cd93---58463590146.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/podamosawufarinisotur.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/90739548729.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/sipobem.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/debena.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-3/20210903134525821274.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/82283402606.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/46938706560.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/pnebe325q4cpq3agnof5ebju7o/nofugidewuwafaluvosum.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/98981966977.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/92761026122.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/14293872407.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/dodupitukanelabaf.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/feredepuk.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/69282295940.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/burodigapaloloda.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161324a8ad0225---biketatojetidubusenone.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/59804347117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=true+blood+report+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_off0000e915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE915 10168 bytes
SHA-256: 63690fdd27a4f31acc4a30fba23c6e9f606f8cab833e5d8858c6b2e9cbb60b9a
font_01_sfnt_off0000ffb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 18336 bytes
SHA-256: ea276c3cc7ed1f32f4928a34190ef8bf7ca30a3957c2d134c57c49b5e4f84d9d

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