Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7a0130f93f6bdb…

MALICIOUS

PDF

85.7 KB Created: 2021-06-18 02:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8f63b0f3d187771666ee9afb384edc0e SHA-1: 88c2b0e5b8d37f40d22f7313e8333503344e8983 SHA-256: 0e7a0130f93f6bdb9200c852eb6a144320ba9eab4c98050af8dcbfa03c36db2c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised upload links and disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9053

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 http://www.iece.in/userfiles/file/pemitosolenuvikekeb.pdf In PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8095b7f0b---61498607917.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/05ac2e9ddfc5d4c488a13d9b15b9dc52/majirinagidagapebi.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/4ullensuorff4033hpkfc25kr0/11213600030.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/vufoxorinetom.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/11f9b7dc82eb6a01a5a6a8fa5ef246f5/regoxogajosorogonuzokitok.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/60825644059.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/03nm8qmj3mfphpijb1isvs8t84/lituvozufodozexetipum.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833485f0491---57531038532.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9nl1frcfg34fl9ttma4c7hdi13/54811195510.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cfe170e504ff1744187cdaf0002e79b0/5589191813.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960edb33375---91938468965.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084382792c9b---xewimulovodejajoteraf.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/90912006772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=anita+prasad+biology+class+10+icse+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001084f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084F 5748 bytes
SHA-256: 937a2e0f0d544efe580955dfe6ec07b7c89a1622f2c4ecc16d415d6dfb53c006
font_01_sfnt_off00011c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C00 11780 bytes
SHA-256: 7afe1755512b12e4ab1e21542e18fc0563b28f83f53b6f1a696682f79b9f5cdb
font_02_sfnt_off000143e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E9 6980 bytes
SHA-256: 4a0e76c753ede726e955d081ab373085eb6fcd71bed9bdb3774d6c2f3b879c17

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