Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e94d6d31aaee4f4…

MALICIOUS

PDF

61.4 KB Created: 2020-12-20 02:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b04226dd57f8382054c9f607a380acb1 SHA-1: bed188057fc5ad58b3a16f5093061e29e3abfb6f SHA-256: 3e94d6d31aaee4f432bb807bde71506e2a96400233d3d1f765aaa378f9b23122
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=prentice+hall+earth+science+2019+answer+key'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=prentice+hall+earth+science+2019+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5fb6dd98ef805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fde4113a025f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5f93a87161874.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/sivanira/beretta_uniform_pro_double_shotgun_bag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf443145a8629dc75eda1/1606284356226/miami_dade_college_spring_break_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09076652-3d11-49d7-b39e-dc6b583d026d/vixisikawufuxerisemogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07792e6-1add-4648-8bc4-5606f56ac2a6/94284879313.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/bogoter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d48aedd2-86d7-456b-be0d-642239cd99aa/weber_the_protestant_ethic_and_the_spirit_of_capitalism.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5608b68612547ed7bdbb0/t/5fcf42e20ff3944fc556a140/1607418595396/neha_kakkar_ke_punjabi_song_dj_mein.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/gre_analytical_writing_topics.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_off0000a85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA85E 5308 bytes
SHA-256: 208564c9d578980cea9cd9023785d4ec8e856bb0832a7364c4d799255bf1eeb6
font_01_sfnt_off0000ba60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA60 9404 bytes
SHA-256: 5b626a05f9596e61aaad267a374d88782d10cbf307232069a14ec69041208237
font_02_sfnt_off0000da82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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