Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e51e0bd8b2ccaa2…

MALICIOUS

PDF

91.5 KB Created: 2021-06-11 19:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c571dcfdb134333fb38e17972f590636 SHA-1: d54f4dfd47b09b04070a16e096c19375feea1d97 SHA-256: 4e51e0bd8b2ccaa2c16e15baf090e461dd48e0906ae4820964c79f3a566bf380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 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://garglob.ru/uplcv?utm_term=heroine+shikkaku+full+movie+eng+sub PDF link annotation
    • http://dagmar-e.de/userfiles/file/26377133584.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/u4t3sp3uai3gfb3sjlgdb5k7o5/bamavazirodidofoxuzevupob.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/97254261803.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/oj4r8ii56g1cqubjg2jj4krch9/96957452399.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/nqlldebkoaj5r3mdpinrlu3c48/78538247319.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/xuganaxobas.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/pibulepazefo.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/df3468c768b4036e4147c9c123198148/90463176809.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/rufaninujadiluwoluvogom.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/19060751697.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/rts1vlpt9lmn8q0iom75al1n8b/dibekiribajowizoketo.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a049b628b6f5257cce5f5c4acdca98c5/firujis.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ngegol8m87ll82f11hkl14uej2/45198009122.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/28647756447.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/35497178594.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/wagoditanewitemuvapuragun.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717fa84faa0---12704054167.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a5d34d3f0---rodexularomosewomixat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 9268 bytes
SHA-256: a0f7a0c2890f745266cfb3de445f3d7afa13d60906a22d49d58e33284cb38efe
font_01_sfnt_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 5404 bytes
SHA-256: 760e16569a9a6a470b1e83f042927d8c34fdb1dc36ac6a742b02401bf1ad0498
font_02_sfnt_off0001167c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 2856 bytes
SHA-256: 489249c102e774afe806b5c3a7169218423c6b38cf0c07968024bb1b1c6f4a5b
font_03_sfnt_off0001227a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227A 10732 bytes
SHA-256: 56eb8f99ae9e56cfe882a607b76d3dd1b7c10e6e89dc97f862004c4f2c6bade2
font_04_sfnt_off0001475b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475B 17112 bytes
SHA-256: 436829979245b7126098886beec731c3e32f79caaa22165f5cf5bd484c81a714

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