Malicious PDF — malware analysis report

Static analysis result for SHA-256 9666bcef3e4147c5…

MALICIOUS

PDF

97.3 KB Created: 2021-06-30 23:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7e4ac51de8dd0a3d1193e8b3320fbab4 SHA-1: 4e0ce0e6edf4f638444b2e730e31205f086eb4ae SHA-256: 9666bcef3e4147c5485bf9247d5a2aa467322f0d9e5a6ec6bb210cef73f51c17
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/cbe6847cf4591fa604a3afca6c0d2e89/28046806224.pdf, are likely intended to deliver further malicious content or lead to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/9ec502d88e5ed1c9d004700db7ed2f04/31634277888.pdf In PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/7a9b9b6a15f2ce73e86ddc148c22795f/1970144341.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/53062383573.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/e88d8051010b76e6c019d7678800d66a/58999790743.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ba89e9dc1---43639972376.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/jaxot.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3e5b64a67---wapawexikam.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/38568511605.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/aorvr64fuau2mdbohug3l29dq5/tutuxubazexo.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/saxisowi.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6fd7e43fb---funozukizep.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/a3k75e32lcpktrvrbvia12ibl4/3382565115.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/23606665026.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9ee62fe0---62866375185.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/53943428236.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/69dd51ce789eede2fdfe8940a36ce529/25685507316.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b26fa5cef73---87288163377.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/g2bull5i2bfvn3cbgan5ksmifm/5621118186.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/d6fb36f2be59c6cf936d2b1e56a67189/paxenalidiwelenobi.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e1cd688d---64915391463.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072b2b983b10---90027968481.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/cbe6847cf4591fa604a3afca6c0d2e89/28046806224.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082caafe52b5---gaminedeso.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/29823879692.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sex+only+for+marriage+bible+versesPDF 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_off000116a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A1 17552 bytes
SHA-256: ffdc5c4cd737077952cae06d1a0fcf84803c121fb6ebf281bb7a91ad9308d49d
font_01_sfnt_off00014482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14482 10956 bytes
SHA-256: 5e575166687acc29ea3abad416f787658390da499aec3cc413177d6debe14c10
font_02_sfnt_off00015dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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