Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9bbcb024e1e502…

MALICIOUS

PDF

78.9 KB Created: 2021-03-19 00:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5b3771a80742852d227aaf82ff9dc14d SHA-1: 42399bff06fc15169cdb0c6f8a3f100a092dfae9 SHA-256: be9bbcb024e1e5020b85ec37e072eb1c9c2bcd69e6da4db6b05680b6ccfa29ad
96 Risk Score

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 malicious domain, disguised as preschool worksheets. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF likely exploits a vulnerability or uses social engineering to redirect the user to the provided URL, which is a common phishing or malware distribution tactic.

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://midufefew.ru/award?keyword=alphabet+preschool+worksheets+pdf PDF link annotation
    • http://znakomstva69.space/tidesafukemaxady167s.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/vizio_e40-c2_universal_remote_code.pdfIn PDF document text
    • http://xosuvirakogaf.iblogger.org/82001600798.pdfIn PDF document text
    • http://mists.space/the_practice_of_statistics_in_the_life_sciences_3rd_editiony5x8m.pdfIn PDF document text
    • http://stroy-level.ru/how_to_workout_legs_with_resistance_bandspktjn.pdfIn PDF document text
    • http://kayikciakademi.com/how_much_do_tesco_night_workers_get_paidnpgdo.pdfIn PDF document text
    • http://libralab.digital/bunetanegihfj0i.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/75981307778.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/tekifapeluvizajoxerem.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/fahrenheit_451_study_guide_answers.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/doxifuba/dujejapedo.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/muzuwogozine.pdfIn PDF document text
    • http://wixuwozovezo.rf.gd/7673921057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8948a2de-6566-476c-93e0-068af9315ddd/xbox_360_wired_controller_usb_windows_10.pdfIn PDF document text
    • http://zerekigukazaja.epizy.com/jazz_piano_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/5142491529.pdfIn PDF document text
    • http://giwolexuki.rf.gd/avatar_3d_digital.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/pusozujo.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/aircrack-_ng_wordlist_wpa2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020398f9-8c1c-4f22-adfb-31e307ef18f5/bose_sounddock_series_1_remote_control.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_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 5528 bytes
SHA-256: 87fee1142e62706980149384d58de44cb94050945bb5c044b0e84b9beec9316f
font_01_sfnt_off00010652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10652 11116 bytes
SHA-256: e684d4f68311ec667401a7b618adcd42d44dcf6c67be6212e8903246ad7d13f5

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