Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3afb320db59b887…

MALICIOUS

PDF

134.6 KB Created: 2021-06-17 04:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: af41f79c4ce5bcd94076275000ead442 SHA-1: edfac0dfd159b2cf77d18f9b9b9b8031228df979 SHA-256: e3afb320db59b88783f0092f81368b227aae961489d115883876fb59b1941470
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8269

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://archism.ru/uplcv?utm_term=ilayaraja+hits+in+masstamilan PDF link annotation
    • http://cesishotel.com/res/wysiwyg/file/56608361016.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/fsokpho0ovgacprqqgkrld06od/nakutamaxapipamorolef.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/dpq553otnq4a3gt4qniu7n0q2q/darexavojesigepikipok.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b67e446a72655bad1af21fffd3e26606/jadosu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdf90710e6---70018051069.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/58a35421527f18e0c6e81ddfaa251690/35843844350.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ds0e68ggtfgkjceejlrs9gmksn/migidij.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/abo8q6dfbbdvjddfojtvhe4850/38450125209.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a38eb088172---31816158087.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ac7fa6110---zedadegujeme.pdfIn PDF document text
    • http://gyobel.itpublic/file/26304940083.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/jikeresajuwep.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608892298d673---wezirufobubusuf.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/6c576c9696b26db1369b8e0f666cccd7/nutepepivedus.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8c58ed2d0---wogulizodivofekedusi.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/2d8s9h1j7v3d2qki9loa0kqm13/jedoputavularunojiro.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D363 4600 bytes
SHA-256: 7085b8830996481fe90f5bcdd11ea7069e42a3b1c9e5618e103ba3a430373fc6
font_01_sfnt_off0001e2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2B3 2984 bytes
SHA-256: 26722c43acd41eaeee5da94a233e5118d1e06578218a0795117694870366a016
font_02_sfnt_off0001eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEDF 11176 bytes
SHA-256: aa074e3e157d920d4468a69a4da8c8aeabc2e79f828255b51b52fbca6e45685c

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