Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f07e2e5d7b15898…

MALICIOUS

PDF

65.9 KB Created: 2020-11-21 08:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ea4231c62e4730a75acfd2a0cb0e938f SHA-1: d6aba3c05dc9ad6662891759d83b516502aaa848 SHA-256: 1f07e2e5d7b1589858732bfd99a516800f1e123f4d9a2a5b5aa3360b866f727d
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://gettraff.ru/123?utm_term=johns+hopkins+internal+medicine+board+review+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5faa5b2628e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_5f9b9c890aefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_5f9641b3cd281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f89ad943fc64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_5fa3e48488a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fafe0bfeb7bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f8e6a019d0c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f87d54625692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5f9804f4e6813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460463/normal_5fb4ab5453575.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/gorajikunobixi/expandable_recyclerview_android_example_github.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/download_apk_bbm_terbaru_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/vusuwemomawuvarefenefa.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/che_bello_essere_dark.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_off0000b779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB779 5528 bytes
SHA-256: 918438d290bd28092c8bbf64193066dfc47c1eea191b9a4a54cabf19b7670c22
font_01_sfnt_off0000ca17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA17 10088 bytes
SHA-256: 76094af6a90d8c02320d4d126c2f79d03cc9b85ef96226fa28dba620cc790ee6
font_02_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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