Malicious PDF — malware analysis report

Static analysis result for SHA-256 519b5a0dd02bf19a…

MALICIOUS

PDF

69.8 KB Created: 2020-11-30 23:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 76c68184252e10a09c0c38f1fb962815 SHA-1: 18cc27efc9543af5cbbed152cf85470c9db56d71 SHA-256: 519b5a0dd02bf19afe34a828e8d75e404fa9a003eaca85959a546215a7acdfc5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://traffmen.ru/123?utm_term=the+piratebay+proxy+2019'. This URL is likely used to direct the user to a phishing or malware distribution site. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', further indicating malicious intent. The document body, though heavily obfuscated, contains references that suggest it is attempting to impersonate a file-sharing service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffmen.ru/123?utm_term=the+piratebay+proxy+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5fa67adcf1e67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_5fae77864c52e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f8b80b0b4aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5fb41283f3bd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fa43d6cc39b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484605/normal_5fbb514578922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5f9912bd2342b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fb2c087a86c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1b807ad7de4c64a61334/1606228865139/the_power_of_praying_wife.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62aa3f75b16643ccec9b/1606378154838/74438218995.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc116c5bdb33045eec368a4/t/5fc180713570fb44d13ba03c/1606516850022/97682502782.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf68dfcb3e0f577147c89b/1606379749115/basivegakeligikudofukewub.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc172ee1972c46e3cd59a86/1606513393203/rabugakujipa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf567a7acac6192ab7cbd3/1606375035030/jexekevupas.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_off0000d5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B5 5436 bytes
SHA-256: 9e6852021f46b0df0737aca54a277419832d09bbcb59c0b8aca4e14394d8adc6
font_01_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 10136 bytes
SHA-256: ab583f48de3111eadd3f45c5ffb56a177b12aa20ccb656eafbfc681a8f9ac6c5

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