Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fc51f58679f78e…

MALICIOUS

PDF

74.7 KB Created: 2021-05-25 07:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8d400c17cca9789fcb5f06193eb47d00 SHA-1: 539b9aacc37ab603828a7547bac721342d0a6eed SHA-256: 87fc51f58679f78e33fbccd25487c3cbc5d2e2ab34a7c48f0ec5664a74171a75
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 0.9999

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://baarspo.ru/strik?utm_term=how+to+connect+a+ceiling+fan+capacitor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482191/normal_605545493cef5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5ffb726d1e33d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_6011e75186d8b.pdfIn PDF document text
    • https://kabuvegezukab.weebly.com/uploads/1/3/5/3/135325093/4533060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_601f5881d1a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498978/normal_600f3beb9e273.pdfIn PDF document text
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/d810290178500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_6038443c51914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6018f9d2b5e2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_6042e4f478b39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375509/normal_5ff7845766e9f.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/dusined/bdd_scenario_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104de4bc-f74f-44cd-8a75-62cae8df616a/continuum_mechanics_course_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24943455-52f6-462d-872f-dd5ab7e0f67d/machine_sound_effect_soundbible.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/1473738374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968ed171-9aa3-468a-a632-233ac1004022/general_science_physics_mcq_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7cf5bf3-c595-4eea-934b-efc457358502/zoselotojitim.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/wotarubaveboxozitaxudilab.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_off0000e87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 5060 bytes
SHA-256: 95cd370a70368b3c36fd1c583aa0956c316d347d38821aa5bc869f1298899a63
font_01_sfnt_off0000f9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 10488 bytes
SHA-256: 081873a35e47f28bccea9a7e64fee083ef49e26a5da5bf7ec956e3a45652ba37

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