Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d406f8bf840cbc…

MALICIOUS

PDF

79.2 KB Created: 2021-05-08 15:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d49b9b5ff351c63dd8fabe8e2c4ff94 SHA-1: 28e591eef423f8b4d9b3317ca102b664b79c05a7 SHA-256: b5d406f8bf840cbc6e978a422da0422f5f43bd5711d47d998bbd5a06d2fcef5d
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating an external URI, specifically 'https://mezovuduw.ru/strik?utm_term=rt-n12d1+default+password'. The document body, though heavily obfuscated, contains text related to 'Rt-n12d1 default password', suggesting a phishing lure. ClamAV detection further confirms the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/strik?utm_term=rt-n12d1+default+password
    • https://wijuluvewez.weebly.com/uploads/1/3/1/4/131437378/sevijubis.pdf
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/mutefizinid.pdf
    • https://cdn.sqhk.co/nexetifosam/ut2iihb/lesogugenofivu.pdf
    • http://hallop.xyz/google_calendar_sheets_integrationfn3jy.pdf
    • https://kozitasulama.weebly.com/uploads/1/3/4/6/134647404/webotuz.pdf
    • https://cdn.sqhk.co/ruwopazeg/VEjgihP/guided_tours_of_japan_2020.pdf
    • http://cmb-eco.com/703582490659zjpf.pdf
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/8ed7c137ea68.pdf
    • https://cdn.sqhk.co/dijogiper/iglhjge/64294443456.pdf
    • https://cdn.sqhk.co/mixenezir/Vc2z80k/tuginemixo.pdf
    • http://libralab.digital/manual_gsm-_911s_auto-_dialerz3rdy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lezipador.epizy.com/bottle_vector_format.pdf
    • https://s3.amazonaws.com/zuguvoxoki/80565689333.pdf
    • https://uploads.strikinglycdn.com/files/b953a47d-8c8a-4004-a4b9-8afa95762790/pugole.pdf
    • https://uploads.strikinglycdn.com/files/92ec91ce-596c-424c-a312-4dde8c376faa/mimogotabitimitu.pdf
    • https://s3.amazonaws.com/zuwosil/76822599627.pdf
    • https://uploads.strikinglycdn.com/files/18c68d80-3b91-4293-8c85-544382337485/natufibezefinesiga.pdf
    • https://uploads.strikinglycdn.com/files/1a3b0e33-67e7-4a8b-bb88-b58941c9cb60/what_does_the_clean_button_on_mr_coffee_do.pdf
    • https://s3.amazonaws.com/wulotugadag/47775956038.pdf
    • https://uploads.strikinglycdn.com/files/7ded913e-e347-4a2b-86d3-47830adf3b43/landforms_of_north_america_worksheet_answers.pdf
    • http://gokobuvutojo.epizy.com/68300142671.pdf
    • http://varaxekewuveza.epizy.com/zafumuwudorawakoful.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_off0000e9cf.bin
4689a3bedadf629ff743db5842ef7bb4dd1327b86b8eaeb077213a968011e51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 5184 bytes
font_01_sfnt_off0000fb9c.bin
3cfad0ab995a81c9f37c4a2b92ea06a72dd8aa37a74c7908d341e6517c8f9531		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 10972 bytes
font_02_sfnt_off00012114.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12114 4324 bytes

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