Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcedb1ed2a244c2b…

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 20:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9ede5c2773ea986d80e16852f99aafc0 SHA-1: a4f5f02d9bbb7409ec978671fffe093537cfb4ee SHA-256: bcedb1ed2a244c2b77b97602f66ae93f6908d3da0265bae9a386e244fdd21e58
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed numerous embedded URLs that form a link farm, pointing to various domains, some of which are hosted on compromised CMS platforms or disposable hosting. The 'utm_term' parameter in one URL suggests a potential attempt to track user engagement or categorize traffic for malicious purposes.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

Heuristics 5

  • 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
  • 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://archism.ru/uplcv?utm_term=emulator+android+10+pc PDF link annotation
    • https://hongming-eco.com/userfiles/file/marimekajitalivipar.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/94767855500.pdfIn PDF document text
    • http://dakov.hu/_user/file/6059980294.pdfIn PDF document text
    • https://12tiga.com/contents/files/vojorijanugapefuferugex.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/91528667789.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/47227315904.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/vimezozizefijojaximopog.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/nadewizafaku.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/58f665899b28bfead23f00dbe7184e3b/lotazuwusuv.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/161399334ef1f0---79755947779.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/dajefutofadumesal.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7254a629e---92140207126.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109011602434104.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16141ad7c77091---talugi.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/metibodabuw.pdfIn PDF document text
    • https://dalba.net/other_files/File/44308591901.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109031637115886.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/zogiwosazub.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/961eed5958bbcc8ad6169dded2507b54/mogorijowisegoze.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/4686406461.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/52476301088.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/nolob.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/siravawowunanu.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/19344110834.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/tofilolat.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caf1aee656---xisanuwezesugikaduxudeta.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 10632 bytes
SHA-256: e72bbcfcd807c8bbecbd762f729f28b2736f22d57081e5a14eea85fd6123edf9