Malicious PDF — malware analysis report

Static analysis result for SHA-256 563ad13af605ba8f…

MALICIOUS

PDF

83.3 KB Created: 2021-08-23 20:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 498003292097686a7417891614d29fa5 SHA-1: 54a24066111c63a6ed2f4b67da97dd7e1408503e SHA-256: 563ad13af605ba8f95d95ae83677e6fc9c1c8c1d3d509a09c6b221646de30db5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous embedded URLs, many pointing to compromised WordPress sites or directly to IP addresses, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of these links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcd18599ac---32402054971.pdf In PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084da248c505---31031743918.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/netox.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b287a295fda6be41a70b947c87c025fb/49956450528.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/bosisepidoku.pdfPDF link annotation
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778309e77b5---10781900728.pdfIn PDF document text
    • http://slsnn.ru/content/file/19261763184.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/tafosonumarosuxamadakit.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/303100746.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d0d9a5f66a511033b35986d31c564c53/67331297356.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/duvuxudajoti.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3bfe6187---nisaro.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/bowisamafasewuda.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/14599402161.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/niwegujumuxakuxotakipo.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/68655717574.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/49457792782.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/75f1e4aa939bf571c1824db2e6bcae31/miburulaxesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=howls+moving+castle+free+movie+onlinePDF 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_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 10824 bytes
SHA-256: a5f8db13397250790fa320ca5369646d4a589cc51fc06a17724e03f9da096d28
font_01_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 16496 bytes
SHA-256: 6b39636ccd8cbd7c8c27080ae29455051f1c7cb515bf0f26d349f35ddc847797

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