Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4d653408a274df…

MALICIOUS

PDF

78.0 KB Created: 2021-03-19 18:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f39f8270807a279a6b4cb8c9a08922b SHA-1: 212d48aa7fe3175a9bc7d105dd919cb9d912558f SHA-256: 4c4d653408a274df3faa9b129108e606c29f1de1b971ed7f06fd2804d863df7c
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/award?keyword=ultimate+bug+out+bag+list+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387040/normal_6051166fadd90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452171/normal_600553463ab54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474222/normal_5fec37c0c4882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_6017dd12031fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5feccd8fae5ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455890/normal_6015af745f74e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5fd7dc39e2f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_60404dc3b8371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_601c98d1572d9.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/tamovagag/derivation_of_cutoff_frequency_of_rectangular_waveguide.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/powerpoint_fishbone_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/lopojeravojujexiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/how_much_is_pa_gas_tax_per_gallon.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/xexawomatalibodikiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/billy_goats_gruff_story.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/college_attendance_management_system_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/envision_math_grade_1_teacher_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/10798141790.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/36306100913.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/sociological_theories_on_religion.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/31787770916.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 5396 bytes
SHA-256: e7f1d728822e2bb60d634498b8cf996b770126b26d407d66a9b850dbbe646d7a
font_01_sfnt_off0001044e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 11364 bytes
SHA-256: 50ad1c65f09d76ffd1524bd95616276d8700e5b0cada3d12c7da2b0efd4c3559

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