Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c534e0605ce1be…

MALICIOUS

PDF

109.5 KB Created: 2021-07-23 13:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0563c038f95484f3216f25b79961107c SHA-1: f19cbea29dc17e1b573ebf2b8f2499f5589a8924 SHA-256: 04c534e0605ce1beb5479600ac6817813934809e0a070c2950b1541ac4f87375
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to websites hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL distribution suggest a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kirilmazbardak.com/userfiles/file/62950451063.pdf In PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9c97deba---34690292193.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/e938cc710ac1ca17a673f4b45ca73cd4/253585811.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23193881e4---2774495855.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/66a65a05857f853f4b8e8e4ac4215554/46777913530.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/b916e47cc711bf9ca251cffab73bedc3/tarawolorigovudimamu.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd11daf119---womapinos.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/1702722006.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9a522cb1---25929922285.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096e4d69f2e0---supuv.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/99894285288.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8a8242390---xudefas.pdfIn PDF document text
    • https://tavio.ru/files/file/49060769771.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/628084de5cfc1fc25f0dbee8d038d28e/lapewivega.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39ec36574f---buxoxuzebaso.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/54027239995.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/gufitozalixidu.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/nujipisifumamin.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/deb63854fb83751c1b58bbcae52829df/7923392135.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ba2b0479---berorepenavelotodemurivab.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/duval.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607776b412232---58312134644.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/8eacd55d8d0d1c67735ec2ffbb1902c5/25418885451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pokemon+vaporeon+coloring+pagesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEE 3392 bytes
SHA-256: 12191a03c1ed0d8d23f01377a1549ae95e768e84268ac10a2299fe673a7ccdfe
font_01_sfnt_off00012d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001459f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459F 10776 bytes
SHA-256: d5fe56887f53102d8d420dc4d7dbc3ce1c69fc0934799a3575a5f3d499defa71
font_03_sfnt_off00015e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6B 17920 bytes
SHA-256: 1e862b4d31832dd3985c1075a3e5f8753f70c002f5b4e81d1c48243915699017
font_04_sfnt_off00018d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D1D 16792 bytes
SHA-256: eb322746d3ac072accb1c1a7b45cb2045771cccdb816429b7739c844d361bbfc

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