Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2298f86c712e00…

MALICIOUS

PDF

78.9 KB Created: 2021-09-17 00:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 97ef8f389b336741689348515d838054 SHA-1: 54f3d963ba7359ac635339889652be981cb745a0 SHA-256: 0e2298f86c712e005cfb3841876131105662094910e704646f1b7a9d6f96a198
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting sites. The embedded URLs and the document's structure suggest an attempt to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8327

Heuristics 5

  • 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
  • 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://dkkarsin.pl/img/upload/files/zeruzimoxonidadobifin.pdf In PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcd19805f7---50137483348.pdfIn PDF document text
    • http://araonline.hu/uploads/file/tusawofazesibodakijurofe.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-1/20210901102705469031.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/23440711907.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/lutubidejolagumetubo.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/mokipezit.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/jizexedazu.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210903052105.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/10810970253.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/xarokavuzateb.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/322ac599fd9bf6fa1644386c39cf3d9a/rakiwafonefixefabidav.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143016ce9423---buvivotasalupebavajigata.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/81168629867.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/bifukofetinedomojesalefo.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/fd29c5b81b9b96b259c20a431a09a68a/86996224977.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/fogimerere.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/73483140968.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/suzopaziber.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/45807369125.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/tometo.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/zipabuwebovirasiju.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/kevenikerifebaf.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/lopewerasuvowowame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=a+thousand+years+violin+sheet+music+with+lettersPDF link annotation
    • 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_off0000d6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 17860 bytes
SHA-256: 0c6e6e3ef28013231c5102039d54e4610f29d847f6318204efff5585315ebf33
font_02_sfnt_off00011d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D97 10984 bytes
SHA-256: ec5a3f52e6436181d1318c451e8b7411254522278b9f1003fa43ee6d7350d1e1

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