Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dbceb2c412c51a…

MALICIOUS

PDF

69.0 KB Created: 2020-12-13 17:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 60eac611ea3c933ab5000757e46908ba SHA-1: ded1d338eea001524d1d340bf8776498287c1e88 SHA-256: c9dbceb2c412c51ab7da4192139c73d9de9983b20b50aa087e1f64de105a2934
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://cctraff.ru/strik?utm_term=iso+17020+quality+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5fbd041bc947f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388629/normal_5fc6f91820ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407818/normal_5fbeafebb9dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469834/normal_5fa6a7eb1c6ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5fb6daa4e88d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_5fb821bf594e2.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://uploads.strikinglycdn.com/files/021196d6-8e54-47f1-a9f9-d782cc9c7ee0/izim_dersleri_perspektif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c1a65a-8f6e-4804-bb8b-f2ff2ea7dea6/viwuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbda281-fca3-460b-96fe-920d2798d860/ffx_mix_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de528d48-4117-46ef-8bf4-54b53c760dce/15229964311.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/the_middleboro_casebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d071306-a678-4a00-846b-7b106ccdccb2/41083345459.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc5b2c83570fb44d1c7eb71/1606791881348/self_care_deficit_theory_conceptual_framework.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_off0000c26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26A 5072 bytes
SHA-256: e802b09e9a2615edd59f495b22527868bda492378bc2c9510ec3e92f454587a2
font_01_sfnt_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 10648 bytes
SHA-256: b2f8d7fc64a814db567cdcf3b5f2566f6136c4d71245e9d76e68ae1e9ab5327b
font_02_sfnt_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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