Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0e7243a2cdd8f3…

MALICIOUS

PDF

82.1 KB Created: 2021-01-04 02:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d22b592f81a376eabaf54a4da5907f0b SHA-1: ee97105c5a450a3f9db0e3e512e7030e0343c9a4 SHA-256: 1b0e7243a2cdd8f3b93d17aad34967ff6e40d9c91b942611ffc0ff47b1c6ab7e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The embedded URL, 'https://gettraff.ru/aws?utm_term=java+beginner+course+pdf', suggests a phishing or scam lure related to a Java beginner course.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?utm_term=java+beginner+course+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5fce5f7af2698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366029/normal_5fcd50c42c540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5fd0c2a83ff44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5f994611554b3.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/Eijjfhh/14699224919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391303/normal_5ff2578abac40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5f9ef91bd0709.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/gggfnmi/taxanagarewulenanidivosak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421476/normal_5feea1822ba9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5faed9f0629c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fc82f37625fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wufujudisu/34333695308.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/dejong_neurological_examination_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/elementos_de_la_arquitectura_gotica.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/seo_website_audit_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/functional_programming_in_scala_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/report_format_in_excel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 5284 bytes
SHA-256: 795a1255d6291333dba6b600ae15337117159e7ad3ad0b0b9d255f17cc1e4b3d
font_01_sfnt_off0001095e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095E 10628 bytes
SHA-256: 9d5e5ba5e5e8065edfc2e5207a5e0b30e62112e6bed6fe7af77b8be05f4b7e11
font_02_sfnt_off00012d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D47 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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