Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a400b0a7479b87…

MALICIOUS

PDF

73.4 KB Created: 2021-02-16 08:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6795973bbc831d5e0a650f566205a275 SHA-1: dd1724116adf80273d8b514ea0dc4ab89a832f77 SHA-256: c8a400b0a7479b8765d442490a2e937e84a5b6c54061f2c387d28e6187216ec3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to translation services, aligning with common phishing tactics.

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://seumenha.ru/strik?utm_term=traducir+pagina+de+ingles+a+espa%25C3%25B1ol+google+chrome PDF link annotation
    • http://kismykeitio.best/catheter_care_guidelines_for_carersvu4fs.pdfIn PDF document text
    • http://reliables.ru/competencias_martha_alles8bonf.pdfIn PDF document text
    • http://idealicait.website/24492908843m0gkh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419452/normal_600903e61b2e1.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/jJrggig/cuando_sale_el_fitbit_versa_3.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/Lgdhgji/tacoma_x_runner_supercharger_kit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_600f239f28420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5fe906f838b13.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/8IZ9gdY/angry_shark_3d_simulator_game_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450427/normal_5fe3dea26edf3.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/texjcjb/gba_emulator_pokemon_rom_hacks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/feseni/votumonejabozivupegunobo.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/remipivuduzupo.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/sepoz.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/lukijo.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/mayer_adhikar_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/credible_sources_of_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/zatalu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C9 5448 bytes
SHA-256: c6ac0706d340b53c81387dd7dd358d4443d961076b07a5e5f6a6799a5bb87155
font_01_sfnt_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 10804 bytes
SHA-256: 58c2bb57709136f9cc02dce9e59f76b61e5b6bd93fb274712e68961b1734fcf4
font_02_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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