Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d84df8b3a060488…

MALICIOUS

PDF

79.2 KB Created: 2021-08-14 02:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1f7191481b71bd85df5273cb802935d8 SHA-1: b7be45d9e522af2fd9b53a3d52ac5769b57e822f SHA-256: 0d84df8b3a060488e7161c1a07d0134d6df4d614a5cb033f50244fd87f9a4635
156 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 uploads and disposable hosting, suggesting a link farm designed to distribute malware or phish users. ClamAV detection and ML classification strongly indicate malicious intent. The primary attack pattern involves luring users to external sites via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://edilgroupdigiovanni.it/userfiles/files/98869349472.pdf In PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf52b11b6---6366417228.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21ae84d225---73117907222.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/rokobusukexalikowosevupu.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1de3d5912---90645853572.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/12a6360f39e8fd9b4e009c965a154ce1/11074339294.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da94e87a1c2---kosixiw.pdfIn PDF document text
    • https://carlojans.com/cms/file/zuxalozine.pdfIn PDF document text
    • http://domplus.su/userfiles/files/likozisotitorew.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/kugusujabulovi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef77fb572f---pulokumikelezonaderida.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c6007f97f9f---vudojizukebuzupi.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/447475427ceaf0f7b31437d6e6c08a84/supumasotodap.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a0253b604a7---mawebanexupojajodoz.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160829f5286c4d---zufida.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/vezodaju.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/moxoforejefigopavub.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/elpng53lmj17l4hu093koed6l0/32273212494.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/aa418468c12376004dfc764c022c277b/nijiwuwukekuv.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/1293bdff8b36c7fd9fd91fd4ca410a90/fixejigimijogabejonunamo.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4b825a54---41962757172.pdfIn PDF document text
    • http://carszana.com/image/upload/File/63576684741.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/9023940600.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62310b9dd7---21008471013.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/10037668425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=hungry+shark+evolution+mod+apk+unlimited+money+and+gems+download+androidPDF 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_off0000d0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 11288 bytes
SHA-256: 0b432c6ca7e102911e9e1c8bf3037144d979f5a7eb7a0847914b89d7d959d89f
font_02_sfnt_off0001030c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 16552 bytes
SHA-256: 2a85a360de1d12c6092a4a4e7299b9915737fc535c214048e7d47123a07bd9bc