Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e54e47ae663e0f4…

MALICIOUS

PDF

72.8 KB Created: 2021-01-24 13:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2b81f8deec24ac89d14dc91705476078 SHA-1: f94d4b9d6f190d3eaadab74b2ba644080d4d5c8a SHA-256: 0e54e47ae663e0f4ade39cba4f8bace1c2bc76ac44027eb58748ac9c491fb467
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on file-sharing services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive use of external URLs points to a common tactic for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://bologen.ru/123?utm_term=parkwood+high+school+logo PDF link annotation
    • https://rifituxajigibik.weebly.com/uploads/1/3/4/5/134519767/4cbdb002b30ee.pdfIn PDF document text
    • https://divisekul.weebly.com/uploads/1/3/5/3/135347680/8632044.pdfIn PDF document text
    • http://penerete.66ghz.com/situational_interview_questions_and_answers_for_engineers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473971/normal_600ced67c850e.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/85f0f00afa3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401555/normal_5fc6c6ae1ebf1.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/ieM3hdU/diliguvirafez.pdfIn PDF document text
    • http://sanadewa.iblogger.org/lonubufiwoteti.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/juvoputuwemaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408464/normal_5fdc7cee9d642.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/zobuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486537/normal_5ff6b9858537a.pdfIn PDF document text
    • https://cdn.sqhk.co/bizewavaxug/jhghwjc/savexa.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/ghgdhil/child_learning_development_theories.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fc9e3e2215e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_6003331fd1e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5fcdf7949518a.pdfIn PDF document text
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/8c3c5ccecc63fa4.pdfIn PDF document text
    • https://fipogelijemebu.weebly.com/uploads/1/3/1/3/131398193/xeneraw_pulixuromax_romezufoliwef_lakejejuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5ff65ee4d4c15.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 5360 bytes
SHA-256: 1b6d7f9fc9257ef3fad09077b85f07750452f234f8ae7f19d095fdf8469cfe59
font_01_sfnt_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 10148 bytes
SHA-256: 967d69037f250f3eb1fff6e1c8b917256df12a0be7ef3a9c6d772fbf0120c0ec

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