Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab06ea0381a1f66…

MALICIOUS

PDF

81.0 KB Created: 2021-08-16 10:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b0e7b44c77ffad1656aa29723e12d00e SHA-1: c4a0affd69d538d56d3488e3bbe1d19a8a129aad SHA-256: eab06ea0381a1f66c7ed6c9e23d9767909504e6ae34233dd93c3e54a04e34779
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/fhjjtke2ukf42t8s5ek6tr9bvr/rojobapim.pdf In PDF document text
    • https://anctools.com/ckfinder/userfiles/files/80258551170.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585a32775b---39201826426.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/41159759572.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/9f8c5cd843d37e9f4f471dc73ef68c27/78699331637.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/488325cc5416a32fadc15c8dea0377ba/sedinogejasuzopizovaneni.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/jajoletawiwapu.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/sisegejalazabaxomevujufo.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/xubuvedof.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3121d21a70---48506482632.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/foladakum.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/3fuqkh40cg252jmrc93k198ij4/lovoxu.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/ruvoboxalilip.pdfIn PDF document text
    • https://congnghethucpham24h.com/upload/files/xoxavekiso.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/vonupedawaxapivisa.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae8d3eecf7---3283621280.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/920e52970efaedec2cf76d4ef832f2fb/46228838277.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2ae78277---82833623518.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210720203747.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/23435166322.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/sopomati.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/japifikidowubune.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=descargar+dragon+ball+budokai+tenkaichi+3+ps2+isoPDF 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_off0000d4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A7 18112 bytes
SHA-256: 6e92ab6b5b85db313102fec08ee3087d59417bfe8b8361d48cf68656f4c3fe38
font_01_sfnt_off00010307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10307 11420 bytes
SHA-256: 348611a92fb4f14d9ca0eff398a0e5cbc70fb23b7b1ec2f80af1da3160ff3df4
font_02_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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