Malicious PDF — malware analysis report

Static analysis result for SHA-256 888f44b9878ccea5…

MALICIOUS

PDF

68.4 KB Created: 2021-03-21 00:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68655890ce2dfe1f402f7b74cd928d50 SHA-1: 97d79478fbf51bab384ab7633e4856bc23c14a94 SHA-256: 888f44b9878ccea54ad03b31cbe84ed34e90eb9254a82d21ac082e5c6f8f1638
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, suggesting it's designed to redirect users to a potentially harmful website. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=10+point+grading+scale+gpa
    • http://kodesurajevo.iblogger.org/cyber_discovery_answers_2019_challenge_5.pdf
    • https://cdn.sqhk.co/remowiwa/i0EhgiP/snow_bros_2_download_for_android.pdf
    • http://xikumidevulofo.iblogger.org/how_to_concatenate_fields_in_access_report.pdf
    • https://static.s123-cdn-static.com/uploads/4470968/normal_5fc5f55233e38.pdf
    • https://cdn.sqhk.co/fukonovum/0Kiiihi/capsule_endoscopy_cost.pdf
    • https://cdn.sqhk.co/fapolokid/jjhWigK/19242679081.pdf
    • https://cdn-cms.f-static.net/uploads/4450727/normal_6011022775c32.pdf
    • https://cdn.sqhk.co/bazurara/ij1e8An/73528678615.pdf
    • https://cdn.sqhk.co/weseseme/jaQjjgf/lidiwivitirog.pdf
    • https://cdn-cms.f-static.net/uploads/4480748/normal_602f97f16ecf8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zivikabazixo.epizy.com/sacpcmp_candidate_registration_form.pdf
    • https://uploads.strikinglycdn.com/files/5405ca06-4c77-4fe1-889a-b45c8ad22f4c/jubowugunegizulanasamo.pdf
    • https://uploads.strikinglycdn.com/files/6d754a10-da80-43ac-b2d0-ed0162e15976/how_to_make_a_simple_origami_paper_box.pdf
    • https://uploads.strikinglycdn.com/files/766b67b2-95b9-4354-9c0f-21536cc79fcb/sisawujegitol.pdf
    • http://xokilovemu.rf.gd/90790930258.pdf
    • https://uploads.strikinglycdn.com/files/067e9db8-64b6-4b5a-b3f7-57697436831e/37873044555.pdf
    • http://givorajosi.rf.gd/java_eclipse_gui_tutorial.pdf
    • http://wiluxejixaraz.rf.gd/apprendre_a_parler_francais_maternelle.pdf
    • https://uploads.strikinglycdn.com/files/a92fc842-5553-4eab-b7bd-000b3c8e4125/grade_5_math_practice_workbook.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd14.bin
6c541595052f213b44488bcd84dd95bd2bdbac7ab2c3031c24b7b3d063011c78
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 5340 bytes
font_01_sfnt_off0000df4e.bin
be0d7e8c58b2751abd46b807808b02975e53e67d3dda3bb5296ffd025991eb28
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 11460 bytes