Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd603b885aa024f…

MALICIOUS

PDF

73.8 KB Created: 2021-06-09 00:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b424c6b8bc9d28b80352f8a6845f2f68 SHA-1: 59b39cd9591ca074d401f59f4ea0c99baccc2b9a SHA-256: 4cd603b885aa024f6824477ade9a803144ea582366467a8f8ff512d22f4ae184
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a URL associated with a game mod download. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a secondary payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://philabc.ru/pbw?utm_term=carrom+pool+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392871/normal_604cedac0ad5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449185/normal_602ec6eb9782c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_60521841116ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_5fd8bcd49786f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fd04f56780ad.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4465396/normal_60b36e91647e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_6066f3b42a50d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463785/normal_6028633f9b289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486981/normal_6010ae7518e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_5fd89415c1bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_603e7d82d83a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_602dd7f4365f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcb381fbd553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_60bbba70a4f9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5ff6a3926901a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420776/normal_5ff0e1372fa1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475737/normal_5fdbde4d4e546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_603f865acccf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_5fdc32c680c6d.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
    • http://papoxuva.pbworks.com/w/file/fetch/144899325/unit_8_quadratic_equations_answer_key.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/list_of_strengths_and_weaknesses_for_job.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144420459/51806729983.pdfIn PDF document text
    • http://rixepal.pbworks.com/w/file/fetch/144520602/60705078216.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_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 4448 bytes
SHA-256: 38ce203aa1ef7d0f7d65691e5521cb53790b3627e2ca43ba25cc4b8a95ba5d73
font_01_sfnt_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 9832 bytes
SHA-256: 3aab01b6b279a8c0d29ea028ea8a5d7d4067dabefdb26f9c2af482084b3071ba
font_02_sfnt_off00010bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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