Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd87f223e0ab3431…

MALICIOUS

PDF

205.3 KB Created: 2021-03-15 09:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1f4ba24410ed86010f23b4d91d675fd SHA-1: e4771fc0b37383894afa8bb51a36aee1d0c21fb8 SHA-256: dd87f223e0ab343184a34207f1093f6798741ab7a6ed096bf3a70b341817f9ed
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were extracted, the presence of an external URL suggests the document is designed to redirect users to a phishing or malware distribution site, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://ponafet.ru/123?utm_term=bentuk+negara+amerika+serikat+pdf
    • http://kirakexig.mypressonline.com/kobed.pdf
    • http://lelekelosutov.getenjoyment.net/how_to_write_a_brief_law_school.pdf
    • http://wugupomovupa.sportsontheweb.net/logitech_mk710_keyboard_protector.pdf
    • http://lebuvowune.getenjoyment.net/ielts_listening_recent_actual_tests_volume_5_audio.pdf
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/pulaxoxaxob.pdf
    • http://fapasevusiledap.mygamesonline.org/10084782133.pdf
    • http://fopekoriw.sportsontheweb.net/papilas_gustativas_histologia.pdf
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/rupuxufukix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/856529e4-f4c0-4e25-9d40-44a7a4c668ac/93609545662.pdf
    • https://uploads.strikinglycdn.com/files/488f474f-fff3-430c-8ebb-81099fd5cfb3/twilight_6_release_date.pdf
    • http://bitujiduruv.myartsonline.com/gutiseduruzuva.pdf
    • https://s3.amazonaws.com/gajabedafot/indiana_university_plagiarism_test_answers.pdf
    • https://s3.amazonaws.com/sizabo/vosubijusukeje.pdf
    • https://s3.amazonaws.com/dorobukasawituw/60734684059.pdf
    • https://s3.amazonaws.com/zetituri/18446159012.pdf
    • https://s3.amazonaws.com/jixerubowi/how_much_weight_should_i_have_lost_3_months_after_gastric_sleeve.pdf
    • https://uploads.strikinglycdn.com/files/ae8d0b5e-532e-4de0-8d8d-02257af4a0df/define_capital_budgeting._what_is_capital_budgeting_techniques.pdf
    • https://s3.amazonaws.com/kafises/r_shiny_machine_learning_example.pdf
    • https://uploads.strikinglycdn.com/files/7c4e204e-4533-46f4-ac91-1b953b227979/harry_potter_8_book_in_hindi_free_download.pdf
    • https://uploads.strikinglycdn.com/files/72ec754e-458a-4b92-86db-5f76b9ecc6c2/duranogewipep.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d249.bin
ae2d33d9fd46f8882ec3584f95eac0fb9d7da35a92d6a2c1ff900010313b0d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D249 5440 bytes
font_01_sfnt_off0002e4c6.bin
18013d1bd035c9e2af1b0e5cb2a6f842a9f73d65ce2cc3b0900e79913d9c722a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4C6 13564 bytes
font_02_sfnt_off0003126a.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3126A 16036 bytes

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