Malicious PDF — malware analysis report

Static analysis result for SHA-256 c268dc39b8fed371…

MALICIOUS

PDF

101.4 KB Created: 2021-07-18 18:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a83661d8e1516e686c360a345119450 SHA-1: 57204f29897f3e7d4a8cd741ead0f2cc3972dbff SHA-256: c268dc39b8fed371d9bbe31fde1445776590f213850725742c7711ec9d4e0490
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicative of a link farm used for malicious redirection. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded links suggest an attempt to direct users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7822

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 https://scalper.ir/data/files/file/19185165359.pdf In PDF document text
    • http://abacusnancy.com/userfiles/file/21382468127.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c536dcad5---vapibomebojonizufogejok.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce4c809bf4---labowuze.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/28871519879.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/molevetotimegoxulom.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/97660916870.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1913dc2dbf---xutabarufo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1292a509f---vufuxopenefe.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/pajul.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/visus.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160906a18f3b27---ruwajozaxemozulu.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/junukosebikadajejovuma.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/a685652950b077ce731ee60fe6cb35ae/20962240005.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/nudakapurufapumunepulo.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/xoxavasiwasipoj.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/zapidererazavotu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d716750d6---vojijufepijipitifulig.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee9d261d8b---58594693985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=ballad+of+songbirds+and+snakes+chapter+1+summaryPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B24 16620 bytes
SHA-256: 7bd1e8c50c01a5591357af55d0b299b511a59e0ed66c5ed24edd3bab5ddc940c

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