Malicious PDF — malware analysis report

Static analysis result for SHA-256 f528096042b0961b…

MALICIOUS

PDF

107.5 KB Created: 2021-03-12 16:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99183fb70fcb2ff6278c8bb24166b522 SHA-1: ae851ddcb3a9f37c02a7664441d292381924da6b SHA-256: f528096042b0961bb32603737c4f8415a534595c13dddaf218f3f869bfe3461c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a URL commonly used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to downloading a PDF, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=o+poder+da+cabala+rabi+yehuda+berg+pdf+download
    • http://creditactive.info/givenazerapakou62.pdf
    • http://iblack.space/sutewawurizufarojejukikemjziw6.pdf
    • http://pedron.fun/orbit_sprinkler_timer_home_depot796f6.pdf
    • http://bokegaf.22web.org/piwunasuputedabogapem.pdf
    • http://punejew.mygamesonline.org/agudas_llanas_y_esdrujulas_ejercicios_para_imprimir.pdf
    • http://vitalia-transports.com/279452496321s99g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a2cd3b2c-ca4d-46ce-a1eb-71abbcc61f3d/2003_ford_focus_tire_size.pdf
    • http://tefetuzuzip.myartsonline.com/what_poetic_devices_are_used_in_the_poem_man_of_earth.pdf
    • https://s3.amazonaws.com/jipowumat/answer_key_english_translation.pdf
    • http://zisukuvi.atwebpages.com/2020_lexus_es_350_f_sport_lease_deals.pdf
    • http://xoxiposewarewa.epizy.com/vsco_x_full_pack_for_iphone.pdf
    • https://s3.amazonaws.com/fodose/highlight_duplicate_values_in_google_sheets.pdf
    • https://s3.amazonaws.com/fixararololu/codehs_basic_js_unit_quiz_answers.pdf
    • http://zutaturusix.myartsonline.com/bishop_eddie_long_funeral_program.pdf
    • http://fusiwati.epizy.com/24096551050.pdf
    • https://uploads.strikinglycdn.com/files/543ef1be-8ba9-4d54-8427-d0eb5ba32cac/jazemujesum.pdf
    • https://s3.amazonaws.com/lulelepese/56858130178.pdf
    • http://nununad.myartsonline.com/stock_market_trading_hours_day_after_thanksgiving.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016981.bin
05e31b0658c5bd9cc08f975a306afde32dfe0ce4b3ae55716f552e83bcb61e14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16981 5600 bytes
font_01_sfnt_off00017c96.bin
ff89bddf7fb6762884822bd6e65fe8e30d48aac462e2d114d312c70f53650686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C96 10524 bytes

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