Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4d6a3e8c692d9c…

MALICIOUS

PDF

82.5 KB Created: 2021-04-04 12:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3da7a14cc2b90e9ac03d0e735fe57406 SHA-1: 0e1fa02a8ee5c8334ac0a13360965fdde92cd393 SHA-256: 3c4d6a3e8c692d9c8058777288e88223557f7154c23a866c19717b2ce6ae4828
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified by heuristics as potentially malicious and flagged by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to 'periodic table blocks name'. The presence of external URIs and the overall detection by multiple engines strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=periodic+table+blocks+name
    • http://kemamibuke.mygamesonline.org/guvelaverisujodezowevuv.pdf
    • https://cdn-cms.f-static.net/uploads/4461516/normal_6061f669111d7.pdf
    • https://cdn-cms.f-static.net/uploads/4476783/normal_5fd0e4fe17e2a.pdf
    • https://static.s123-cdn-static.com/uploads/4368956/normal_5fc688ac5633c.pdf
    • http://vatamuvemazaril.sportsontheweb.net/presente_perfecto_y_pasado_simple_en_ingles_ejercicios.pdf
    • https://cdn-cms.f-static.net/uploads/4475375/normal_6013b1da67f40.pdf
    • https://cdn-cms.f-static.net/uploads/4390330/normal_6067bd3985058.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/poresi/musoj.pdf
    • https://uploads.strikinglycdn.com/files/4773a5a9-0403-44df-a164-ac2ff30a4d4d/70642076797.pdf
    • https://9c50f6df-e9c1-453e-a208-eff1cefe231f.filesusr.com/ugd/44b3dc_51a9259425174cd693a1558a769af214.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fa6b2e7f-1d39-48e7-b50f-f8e6e06ee56b/muxiwidakux.pdf
    • http://mizetum.onlinewebshop.net/mushroom_biryani_recipe_in_tamil.pdf
    • https://s3.amazonaws.com/jedaxopopuko/22444159213.pdf
    • https://uploads.strikinglycdn.com/files/1ef0d2cd-a73e-4ddd-8268-e3340e4a1900/9815419372.pdf
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_bd6ccc9a38a74164931be1b1d692831d.pdf?index=true
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_8074db8731ba4ef5a94f1b82a26cecd9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bc6f7c9a-5676-416f-80c4-5be3dcdb1026/learn_hindi_through_english_books_free_download.pdf
    • https://s3.amazonaws.com/gapivegek/sozirowovilekaju.pdf
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_91319f6a856e4d588d076ad4a6a862b8.pdf?index=true
    • https://s3.amazonaws.com/suzixegazunow/deepak_chopra_21_days_of_abundance_day_16.pdf
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_a6412e4fdccf40e1bee36adf5cf6cffb.pdf?index=true
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_7b02491bd035475f914df968592eaa54.pdf?index=true
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_b1b728fcc6624e7087554c0652c19acd.pdf?index=true
    • 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_off0000f5e5.bin
2fc2f3933f79c0f3067fe6a505e3b1cc670ee2ccd62ba1f9fc9c98b820f20507		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 5076 bytes
font_01_sfnt_off000106fd.bin
aa977ecd13bc8854f1c963106353d65fb04c7f8b6b4e3b2afb3f469bb68d5246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FD 11332 bytes
font_02_sfnt_off00012d21.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D21 4324 bytes

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