Malicious PDF — malware analysis report

Static analysis result for SHA-256 634ab3bdfbdd7ed3…

MALICIOUS

PDF

78.8 KB Created: 2021-04-02 11:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8780d6b4833a5153be426ce3f569ce44 SHA-1: 7e139a1f174307dfa13bc76c541a61ae9026b1fa SHA-256: 634ab3bdfbdd7ed3f4e9779358845da1b0cd854a25d653bea0c47430817ec706
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification and ClamAV detection, indicating malicious intent. It contains an embedded URI pointing to a suspicious URL, which is a common tactic for phishing or distributing further malware. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

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://ponafet.ru/strik?utm_term=excel+vba+array+size+ubound
    • http://rijuwutosepirol.iblogger.org/annex_10_aeronautical_telecommunications.pdf
    • http://tewezivigu.22web.org/english_reading_exercises_beginners.pdf
    • http://shop-profildoors.ru/zarexabetafamodigobezukiw4n3e.pdf
    • https://cdn-cms.f-static.net/uploads/4494668/normal_605f972a46427.pdf
    • https://static.s123-cdn-static.com/uploads/4443594/normal_5fc999330dba0.pdf
    • http://uuuuull.space/46464246124j59lv.pdf
    • http://milanbeach.fun/51996571612v9fff.pdf
    • https://cdn-cms.f-static.net/uploads/4486548/normal_60135adee9f0d.pdf
    • http://verification-help.com/chemistry_balancing_chemical_equations_worksheet_answer_key_page_58417ta.pdf
    • http://gojovobikazed.iblogger.org/79123446988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fofeguj/55127431403.pdf
    • https://uploads.strikinglycdn.com/files/68ef8759-eec5-4fb4-ab95-8b3f272d4c2a/watch_como_agua_para_chocolate_english_subtitles.pdf
    • https://uploads.strikinglycdn.com/files/03303c68-389c-485c-8708-f90ef8ed8a7e/10_day_green_smoothie_cleanse_5_day_grocery_list.pdf
    • http://xokukojowadoj.epizy.com/maria_montessori_timeline.pdf
    • https://uploads.strikinglycdn.com/files/8dff935a-f5ac-414d-a3bb-72f9e09f97ba/kalexil.pdf
    • https://s3.amazonaws.com/juliziwojatige/47612986728.pdf
    • http://sujaroganufurez.rf.gd/86095984487.pdf
    • https://s3.amazonaws.com/wulagisi/41482897913.pdf
    • https://uploads.strikinglycdn.com/files/69230459-5910-4cfd-af7b-44867ccddeb7/1650_super_vs_970m.pdf
    • http://jojanotesejivi.epizy.com/k_s_letter_whatsapp_status_video.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_off0000e7ff.bin
313ef9fa6af29af3e8fc9c9a89e82157d98871e05b804639c65d904bcf3d3c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 5112 bytes
font_01_sfnt_off0000f96d.bin
e478cb3a79ab0375dd3c7f45bbf4bc8773928e55262f3426a5f6ad473262b68a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 11292 bytes
font_02_sfnt_off00011ff3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF3 4324 bytes

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