Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4592e6a177568d2…

MALICIOUS

PDF

92.8 KB Created: 2021-09-07 17:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d90ab3051a247be263b54c64ddd5e3a SHA-1: 04cd6e52339bd12ea45140d9e7add34a50ca910b SHA-256: e4592e6a177568d272d93792cf96ecc020382310cdca33bb30fc887576f9c360
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting domains, suggesting a link farm designed to distribute malware. The presence of a raw IP address in one of the URIs further indicates malicious intent. While no scripts were directly extracted, the PDF structure and heuristics strongly suggest it's a delivery mechanism for further malicious content, likely through embedded JavaScript or other exploit vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://timandlor.com/userfiles/file/sovigikilifejuf.pdf In PDF document text
    • https://needletherapy.eu/upload/file/44126160964.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b427793db82---zeposubasa.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf49dd3b4d---jebugotoxifusoteza.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba614f6fdae---57411093047.pdfIn PDF document text
    • http://one9five.com/userfiles/files/lebagik.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7f234099---47569170774.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/xolam.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/fibinonuj.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/f9f9264d945f9d8b21e7de8fbc701afd/pugulej.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776c633e083---filuzex.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/25002107201.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/91753565428.pdfIn PDF document text
    • http://maygiaphat.com/upload/files/68193577363.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/l7mojle3umgpb8jajomfrtid37/21288855338.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/vujawinuvolo.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/b798fgmpaucfa6njccc3l50vs3/zorelolafo.pdfIn PDF document text
    • https://menu2uplus.com/images/file/85457437557.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/c27d378e2ad44a41ddda65f4503dbd0b/marer.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da5f806d59---96719993935.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/11331669756.pdfPDF link annotation
    • http://densayhongngoai.com/uploads/userfiles/file/40591824763.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c8bb6a8ee---sovazimofidanaxepexeta.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/nuxizari.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/b313c38eec0ff52c29abfc9404fd7fdd/fokifebuwosikafemime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=academia+de+vampiros+5+download+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_off0001031c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 18360 bytes
SHA-256: 5c3a0d0a5fd977ac907a0f42f4d2c47c6df7cfd4ed85beef8c5b83243f4cd6a0
font_01_sfnt_off00013369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13369 10948 bytes
SHA-256: 376c4d84346c309bed89858f8006549498c7421b15e6f3cecc7b6a752701a2c9
font_02_sfnt_off00014ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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