Malicious PDF — malware analysis report

Static analysis result for SHA-256 15074f4bfab4489f…

MALICIOUS

PDF

94.8 KB Created: 2021-09-05 06:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ba201bda520dd0cbb10fb419947469e3 SHA-1: 77b42a77e107adaa05d27200a1828d081e41e451 SHA-256: 15074f4bfab4489fbbabf7b8670352276ef6b4f8c516a2340e269b3ad48e47ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. This suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/f85ace403030681c09df7040892fdd92/25377570839.pdf In PDF document text
    • http://kengosushionlineorder.com/uploads/files/82166831605.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/lariwib.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/fovofubajufeku.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/naxeguwesusasoruvixewum.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c92e82008---zupuj.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/54208223537.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/32062965034.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/ra0mhhfgk849vhs09b1d6t03ln/77685250042.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/70952175535.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b408e52f87---majebobexitogaxixaj.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1c4f82a2a---lotazojasebikuduvuwimu.pdfIn PDF document text
    • http://lphs-the60s.com/clients/5/5a/5a84a5cabe7f31a06b4bf99f7e1b7ad6/File/nuwelipexokebesanegiwuxe.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/liforineduruzixupi.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/denonumutedow.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0533bdab079a8da75b2b9fa7f54cf595/33015775079.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/92212242539.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/dvi48apislvopep0dmgdulhltu/doruwurem.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c561bd067---74971577696.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/diirk9rl979gmmjuopdbokak37/nawikuke.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/3aa43ab2dcde7c7912a17351bab55c1d/vulefufegilud.pdfIn PDF document text
    • https://actorconseil.com/files/file/64111946455.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b22ead193c2d92e05338156645b797b7/90036202787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=entrepreneurship+project+report+on+restaurant+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_off0001098e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098E 19456 bytes
SHA-256: 46808652400bb5ecae207cc11afd27abacb69b30600b6453a32d8e53e030992c
font_01_sfnt_off00013be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE1 10884 bytes
SHA-256: d1d624b7c7a1a035d32119ba44f52e23c03a667d875477c5189ea715f1391c89
font_02_sfnt_off000154ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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