Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9511800b438b02…

MALICIOUS

PDF

74.9 KB Created: 2021-02-25 17:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f7685e62e429c663c1377b418e760e83 SHA-1: 3b08314f463e367c9605f863b6f831c4397a68c6 SHA-256: dd9511800b438b02134572c59e8defe131c10a5667b53d424191f3a043814053
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'leonvi.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'scientific research'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests an attempt to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=tipos+de+investigacion+cientifica PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386607/normal_60047e5b80022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fe778ccba963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383805/normal_5ff65645bcb5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5fdb15a3db18e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5fd77e9933cee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5fffac69960e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/potamotaz/sigasogepexaresigejebizap.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/sikezavo.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/brenda_fassie_songs_black_president.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/91844679829.pdfIn PDF document text
    • http://xasaduditomup.epizy.com/gijudekovelomuve.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/alibaba_story_video.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/1859796255.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/5349582957.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/google_adwords_campaign_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/answer_to_complaint_california_state_court.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 5204 bytes
SHA-256: 57c0ebf6c6452769a74188f5d77f6fc1a025cbd8ba992505da86592cdcb377dd
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 11544 bytes
SHA-256: 102988bce856cf7a3822883923d95d9bf528e5c82644470ba99a935cccd62a83

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