Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81a01973678874e…

MALICIOUS

PDF

84.5 KB Created: 2021-07-10 07:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 00a8eb3d329f8d8ccfde09c605347d5e SHA-1: b1c05c648efcd43c1422f4d37f353e313e4ad16c SHA-256: e81a01973678874e5352bdbfb6c4bed090d8dd238942e02b6b89957e8d5029eb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2679

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://coretry.ru/uplcv?utm_term=bell+fibe+tv+remote+manual PDF link annotation
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d2ced6b01---janepibujalutoxuwoje.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/9e4b1a45cd1ea505c7d913f679888af1/52672168299.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91b6703e2b---jadunabukiruvaj.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db1191c6d3---62011957498.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/midilovesurugonupube.pdfIn PDF document text
    • http://ozari-ua.com/files/file/8997804449.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f26c23995---99724479066.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/lumununu.pdfIn PDF document text
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/zuneberubetujisarosadidu.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/55322403207.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758a895b00e---44730613322.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xalijebelixiruwesafo.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea44a61c78---liwumawepunedulod.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c39a7819a64---56530589473.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/20f69c87aaae225c361b815fd8a6226f/18022219206.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/61261380655.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/774c77023848e378165c965adcf3315a/fadudakanasa.pdfIn PDF document text
    • https://digireg.it/upload/98743094962.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8d459f72e---winirupizufug.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/f3c0bd9712ac3fca1941740d293a1003/47593361493.pdfIn PDF document text
    • https://lasanisports.com/files/7978934992.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4e92812ac---nakubirazixali.pdfIn PDF document text
    • https://besteva.com/upload/files/20696289099.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/kofimubufut.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/fea52b92b748268a17e9472a074095bb/roledeguxuvomokagetenura.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607236281ade6---73538213977.pdfIn 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_off0000f665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 17188 bytes
SHA-256: 5f315c74d1eddba3f2fa15de5c7517305c14cf18b6c9d58a8f93ec987f91229a
font_02_sfnt_off00013b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5F 10568 bytes
SHA-256: 9affacc7726aeb8bedab3a19880a1a9a61241b1c6a4829ba248dcf66270cce52