Malicious PDF — malware analysis report

Static analysis result for SHA-256 d249c30a196de4ab…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 00:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 57c9ded327952f0207a12fdfb6758fc5 SHA-1: 33af2556a70e647685cad303efb36dcfa1ec5e0e SHA-256: d249c30a196de4abb52cb388a0b7e142bd86db212c40fab88a39965939d2e7e9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised WordPress installations, indicating a link farm designed to distribute traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://agrion.org/upload/fichier/14060745635.pdf In PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/magojimisemuguvokox.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf89e5bcc---pupot.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/15032907170.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132fb08052e5---25011470879.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/33298376572.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/pojukeletexilewulebakozo.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/vegopekujabufurikubik.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bdmps1sul0tfpik9nu5s3f3kr3/46399101047.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/fupiru.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160dc75ee87473---vigapobafife.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a79dd8a4c47---kaxudipodiralenuzano.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8dcdcc873---ziforiwoxilirilonugafi.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/28793297949.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082d7271a63a---rejafarodo.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/98891809621.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/908fec3e570093f18be77a058dbeaf3a/wonifojanadojozufuzapalo.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/96652156080.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/renegifopejirev.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd7ae53bc---48430709599.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/25456411028.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093a8a796535---kofuvademozerutifolesa.pdfIn PDF document text
    • http://accronline.com/userfiles/file/pumanapopuvuwet.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/pulusogawujiwutewevenix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=2009+ford+taurus+x+manualPDF 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_off0000dcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 10804 bytes
SHA-256: ce52327ab4b709a1f6f9fd8e22facf07d030350a175f12df5a50c8cac7375f41
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD2 17924 bytes
SHA-256: d834354259b4e20ff34b1215fd01c4cd3b1c28b2c12d2fb95004109435c989b2