Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9c9120d68b4f1e…

MALICIOUS

PDF

72.6 KB Created: 2020-11-26 04:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 085086ee9a1348e1e73684d35e54f7da SHA-1: 72b9c7638ef02f14e4d68896c9224b1d855577e5 SHA-256: ea9c9120d68b4f1ef0d340d20004cac5b57d2f5f0682422fd9ec2c3e1fa952f5
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=mhw+elder+dragon+tracks In PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/texipimisajorizip.pdfIn PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/luwubakujetenapavez.pdfIn PDF document text
    • https://gewilede.weebly.com/uploads/1/3/4/3/134311853/bc490db2c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a33c99c-d284-41f2-ae34-ff86a1b22137/dospelch_tabu_prbehy.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/popafewosovupufanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cdd7508-dda8-4123-8aa4-93d2f8fda1ed/36177055837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26eae40-b51c-45ac-be77-fc5a265bc353/kijutukilil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088c64fe-f969-4703-9a7c-535fa7b5b02d/bibagijulaxidij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80787437-43c2-4528-a9b2-27a44ff21f11/52520129275.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/lerekidasikilusur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45cf66e-1a5c-454f-b3f3-29f8afcaec64/87362112139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4344ed47-1391-4a86-9ada-b136d37dc2fb/22384290774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad724fb-1c43-4dee-9295-ed36417be849/fallout_5_nexus.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/die_ketogene_ernhrung_bei_krebserkrankungen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736967f8-a5b4-435c-87d0-b7d8ea4da148/kawumutorakatubipabij.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FD 5364 bytes
SHA-256: 63b067f6d8bc17a5eaf8f1efd478dbfa72e36b0d4f5fa58b674c49a13e84def5
font_01_sfnt_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 10804 bytes
SHA-256: d49978b77234e05665cedf2a95f209bb91130082249f1f10e89b8b4d0bf52978
font_02_sfnt_off000100a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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