Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b661d88c1eb3fd2…

MALICIOUS

PDF

85.3 KB Created: 2021-04-06 16:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2ee058d67f2c7c43c383954f090754a8 SHA-1: 199d98f4bf691ae79e3488249aa89ba30ca20d5d SHA-256: 3b661d88c1eb3fd25207b010513e7ec657b2bc04dc0c7c66f6f8b4b30b62f403
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=cuantos+hermanos+tienes+answer PDF link annotation
    • http://gajikabe.iblogger.org/kenetrek_mountain_extreme_vs_mountain_guide.pdfIn PDF document text
    • http://milukiwidawedej.22web.org/androcles_and_the_lion_play.pdfIn PDF document text
    • http://takilajonireko.22web.org/rifepigaw.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/57355878372.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/1260048382.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/lizafalisunizugaravetug.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
    • http://julepudelixi.rf.gd/human_body_parts_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/codehs_answers_key_3._3._4.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/trainer_battle_realms_2.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/51247736348.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/gatlinburg_tennessee_snow_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/bootstrap_template_design_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/entropy_in_information_theory_and_coding.pdfIn PDF document text
    • http://badivisixeg.epizy.com/biblia_de_jerusalem_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/cyber_security_diploma_in_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/aditya_hrudayam_lyrics_kannada.pdfIn PDF document text
    • http://juzefabamurever.rf.gd/really_good_formal_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/technical_communication_today_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/how_to_update_my_parrot_mki9200.pdfIn PDF document text
    • http://wewonak.rf.gd/1992427617.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/patti_labelle_i_m_in_love_again.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 4888 bytes
SHA-256: 5cf841528ba0bb3563d8be9fe312d60996916bfdbf4fbcdd4da9be50f00b36ae
font_02_sfnt_off00010883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10883 15944 bytes
SHA-256: 051ae085b9c6b393f1b3a8113969e9aac7d21b7b606f63715d86d8cd148a4cc9
font_03_sfnt_off000138f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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