Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff26e8ce3ae78112…

MALICIOUS

PDF

116.5 KB Created: 2021-06-12 14:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c7201410619be999277992fe0a15f121 SHA-1: 776b214afb5878d53fce77097ec9debbb88cb2c1 SHA-256: ff26e8ce3ae781125b86f9feaa9208d92ef2e1ef3b429777a1dfb4217137353b
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the primary malicious activity appears to be the extensive use of external URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2625

Heuristics 5

  • 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
  • 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://pixomot.ru/uplcv?utm_term=romanticism+differs+from+classicism+how PDF link annotation
    • http://mytmbc.org/fckimage/file/kabaxugixibifafarobok.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3dff0ee849d2e9d81307e27c5b44eae8/61875609724.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16078e47a76472---pixivomasopegubinopi.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/fumut.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/2a3c42d5c1b7f9cc15c79afc39156929/17600731847.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/36575778275.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/73367871601.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609499597c912---rotiluvewitasudupogin.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160842694d3ada---40359393900.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad6159b8b0---57468728422.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/zimuvat.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3e01afef8---37218027536.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5540154fa---sajexajutezizaletolap.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/40994049033.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/e397a08d88624ef99eea95ffae46233f/vexipopewesanifuwuli.pdfIn PDF document text
    • https://bem-sa.com/img/file/33854467968.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073703005b75---91510599899.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE8 7000 bytes
SHA-256: c4055df0960568c9fe7516bf10d74b7eca9e6decca272c1ff1f25f8e7bfefc38
font_01_sfnt_off00014e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E4B 4184 bytes
SHA-256: b319b8aa4456a5f0f8189e5fa8199c3576eb4e28ae9f726ce82e17a0ef2452da
font_02_sfnt_off00015cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF8 5360 bytes
SHA-256: 75c20ddb67a862693dd6b0a6ebe085e9c6f0f1fe13089131944d74e0b4b03735
font_03_sfnt_off00016f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0F 9052 bytes
SHA-256: fbe079ea15c0c75406fece75377c1db2b92514e8ba0084bdb1f79f96992494bb
font_04_sfnt_off00018153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18153 2020 bytes
SHA-256: 8e984b93e3234ccf55113b115bb33e3bb028525f6874b161de1f0521464d2faa
font_05_sfnt_off00018af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF2 15360 bytes
SHA-256: db3b1656a0ce9abf0f97de4f075f8e9cfc0bfefa58afd4405717e996ff56093d
font_06_sfnt_off0001be0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE0A 16816 bytes
SHA-256: 12bf27839723489a2849358effdea14975f5e6c0594aa707f3022a1390bf52ad

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