Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacebfccd8dc7c68…

MALICIOUS

PDF

77.6 KB Created: 2021-04-10 16:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ddcf2277d3f51b64c20c924443212d0 SHA-1: 665b10d7b916ec7970389860beeef1faa43aba6d SHA-256: eacebfccd8dc7c685eecb2b56917cde460a6ecbc58aa6884e111636ecd47915f
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body appears to be garbled, but the presence of the URL and the detection signatures strongly suggest a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=meyer+e47+pump+oil+fill
    • https://cdn-cms.f-static.net/uploads/4372085/normal_603836735ad00.pdf
    • https://cdn-cms.f-static.net/uploads/4476007/normal_60157ef1f1ede.pdf
    • https://wewiwefiwowofaj.weebly.com/uploads/1/3/4/3/134369931/bunakezafadur-zezebax.pdf
    • https://static.s123-cdn-static.com/uploads/4443356/normal_5feb5f6cde391.pdf
    • https://cdn-cms.f-static.net/uploads/4422373/normal_602f6a894d500.pdf
    • http://tudewulowas.iblogger.org/aetna_par_provider_dispute_form.pdf
    • https://pavovebowejimop.weebly.com/uploads/1/3/1/6/131607108/kufutamilelok.pdf
    • https://cdn-cms.f-static.net/uploads/4468536/normal_606d5f0884675.pdf
    • https://static.s123-cdn-static.com/uploads/4424330/normal_6005c00583ffe.pdf
    • https://cdn-cms.f-static.net/uploads/4380393/normal_6068c8695c18c.pdf
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/0c981d09.pdf
    • https://wusaworapivuwor.weebly.com/uploads/1/3/4/6/134659128/sutanenugokake-bedakutijagut-bezovodoweked.pdf
    • https://golotarati.weebly.com/uploads/1/3/1/8/131856611/b3ac707.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fifomi/xanaviju.pdf
    • https://s3.amazonaws.com/vabemavuputenif/leo_horoscope_tomorrow_astrology_answers.pdf
    • https://uploads.strikinglycdn.com/files/708ba332-83f3-445e-87d4-2e7f77e322d3/how_long_do_you_put_beef_jerky_in_a_dehydrator.pdf
    • https://uploads.strikinglycdn.com/files/3697b774-2641-4c30-ab2f-e890114ea926/60280510076.pdf
    • http://puwagof.rf.gd/kitten_s_first_full_moon_worksheets.pdf
    • http://rawifujit.epizy.com/rikezonitazekerub.pdf
    • http://tiliwadovi.epizy.com/reported_speech_paragraph_exercises_for_class_10.pdf
    • https://uploads.strikinglycdn.com/files/54051a17-7c8d-4a65-b383-bd7eb2733726/historia_natural_de_la_enfermedad_de_la_enfermedad_del_covid-19_de_leavell_cleark.pdf
    • https://s3.amazonaws.com/xalexojaxipud/delta_miter_saw_parts_36-235.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_off0000f383.bin
4fabfb2e6114f71fb6d88bf749b07e50d5544cad378da043d608f09900f897e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 4936 bytes
font_01_sfnt_off00010462.bin
477efde8acacb753931777cd922473b8416b66506b48255e943677d95c5c24fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 10912 bytes

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