Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f77636b1eb62a0…

MALICIOUS

PDF

52.4 KB Created: 2020-11-06 01:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b8bb52193bfe16f46e019daa2316a15c SHA-1: 2702763bd3f0c8c08874fc0418f075204261ad8f SHA-256: 05f77636b1eb62a04cbdbfadc3bacdbe62d0357fda63082acc4213a68295e802
94 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 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 1.0000

Heuristics 3

  • 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?keyword=the+cell+cycle+worksheet+1-38 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f8f6966398cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5f99263963762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8708c356ea5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/tamuluwifotured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2328e4f-767c-4420-8346-fc014291d9bd/1739494573.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/lubasari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc4072f-a8dc-4f80-bc36-f66881334f6f/vt_v_c_phi_l_t_ly_khng.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/mumawomijipoke.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/national_association_of_hispanic_nurses_houston_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/51728677300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d4f89a-7a1f-4b09-b5e3-aebaf18cac8d/77761441096.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/usg_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f168e73-ea70-4245-b44f-51742249f09c/pekekupi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009f28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F28 21988 bytes
SHA-256: 49319398598566348e19397c9700e86875f87dcd41d13daf8893edaa098d4433
font_00_sfnt_off00006a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A13 5328 bytes
SHA-256: e2dd63bb5d21bf3bcdd5a1b62e2f43f5d1f0a0e2d8c88f413421cb7fd9ebe232
font_01_sfnt_off00007c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C55 10400 bytes
SHA-256: 2700e9e7deb7d4ff934f9ee036e06e07d1e3af1a4dbb9f9a43ff54082979c0a2

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