Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52bc17cab6669d6…

MALICIOUS

PDF

77.9 KB Created: 2021-05-31 23:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16562ae4de70c63f3be0380f66ce3359 SHA-1: 48c5736061710a7bfe076bc9bcdb5271fb203ff9 SHA-256: f52bc17cab6669d63626b8d0cbd9b5ae9d0032a126a3f5cec5730dff6374c976
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an embedded external URI, and the ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to resume formatting, directing the user to the URL 'https://wastran.ru/pbw?utm_term=how+to+put+a+resume+in+pdf+format'. This URL is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://wastran.ru/pbw?utm_term=how+to+put+a+resume+in+pdf+format
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/8e7c95ebc.pdf
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5fe15829bf000.pdf
    • https://xudepafuvinuk.weebly.com/uploads/1/3/0/9/130969511/perepidosobevufida.pdf
    • https://cdn-cms.f-static.net/uploads/4447095/normal_6035cdfccdfd7.pdf
    • https://sakenudawajaka.weebly.com/uploads/1/3/4/5/134595508/wadigidijafipesij.pdf
    • https://cdn-cms.f-static.net/uploads/4501656/normal_600a0415bff54.pdf
    • https://cdn-cms.f-static.net/uploads/4448713/normal_5fdc20803eaf3.pdf
    • https://static.s123-cdn-static-d.com/uploads/4417327/normal_60b5351e86614.pdf
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/sekovuj.pdf
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/5959633.pdf
    • https://cdn-cms.f-static.net/uploads/4405642/normal_60643db933524.pdf
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fc65bed54ebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xojifot.pbworks.com/f/nifanesivurabago.pdf
    • https://uploads.strikinglycdn.com/files/6d6676cb-c8cd-43cc-aafd-05151bdff0c7/bazoz.pdf
    • https://uploads.strikinglycdn.com/files/bc13b19b-038c-4c0d-a06d-2f73128d1a80/coleman_powermate_2500_manual.pdf
    • http://nilanom.pbworks.com/w/file/fetch/144416556/what_is_an_output_force.pdf
    • https://uploads.strikinglycdn.com/files/d8742f50-975e-449c-b925-9aa169074163/rajarupujuwat.pdf
    • http://zelovoguvunu.pbworks.com/f/how_to_sync_jam_2_wireless_speakers_together.pdf
    • http://zepupifob.pbworks.com/w/file/fetch/144426084/how_to_find_average_speed_in_physics.pdf
    • http://pupowivala.pbworks.com/f/babul_meriya_gudiya_audio_song_download.pdf
    • http://garigor.pbworks.com/w/file/fetch/144427533/test_ingresso_bocconi_2018.pdf
    • http://bojirakaj.pbworks.com/w/file/fetch/144424938/rajasthan_patrika_news_paper_today_in_hindi_barmer.pdf
    • http://sewafebi.pbworks.com/w/file/fetch/144426612/what_can_melchizedek_priesthood_holders_do.pdf
    • http://xojifot.pbworks.com/f/taylor_fundamentals_of_nursing_9th_edition_ebook.pdf
    • https://uploads.strikinglycdn.com/files/5bea0cdb-c1c0-45ba-b403-dd5518f18b1c/ximabetabujopijujolebagep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e757.bin
2e038f992a94a13fae6d95828bf4a45c2da005605aa54ee5c74e81edcd30611f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE757 5088 bytes
font_01_sfnt_off0000f894.bin
e3c20546fe6fd66ddafe4163e63236666fef7602de854bb8b93e9a2562833f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 10360 bytes
font_02_sfnt_off00011c05.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C05 4324 bytes

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