Malicious PDF — malware analysis report

Static analysis result for SHA-256 09aeb3e5a4300941…

MALICIOUS

PDF

82.8 KB Created: 2021-04-03 01:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cb37c4826a425e5bdcb23c4cf5c05756 SHA-1: 0b78c9a8b1cbcaeddcd7086ba9d0e08c630a92c3 SHA-256: 09aeb3e5a4300941f6f087a019d4f10eeb39e693290f50580245b8d5757be0b1
154 Risk Score

Malware Insights

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

The file is a PDF that contains a critical heuristic firing for a malicious redirector link, pointing to 'https://dafemum.ru/award?keyword=cockatiel+mutations+pdf'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=cockatiel+mutations+pdf In PDF document text
    • http://wibifowomotab.iblogger.org/atziri_guide_poe.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://static-start.top/nawaribejojemolatu9mpgz.pdfIn PDF document text
    • http://rirarojafetojep.iblogger.org/como_eliminar_tarjetas_de_credito_registradas_en_amazon.pdfIn PDF document text
    • http://itanto.space/who_moved_my_cheese_free_audio_download4po60.pdfIn PDF document text
    • http://mkr-olimp.info/red_hot_chili_peppers_pretty_little_dittyypygv.pdfIn PDF document text
    • http://regvoolkim.website/juegos_del_hombre_araa_para_pc_descargar_gratissvr4j.pdfIn PDF document text
    • http://dkblogin-de.best/rewusojoxalepijidukenudavg1id.pdfIn PDF document text
    • http://atlas-copco.su/mepetiwotubugutibzijbn.pdfIn PDF document text
    • http://sdl-trade.com/vunilejeru4xyxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozefemalevarug.rf.gd/zolotelezo.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/gisul.pdfIn PDF document text
    • http://gagoxuxu.rf.gd/80179649854.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/scholarship_2019_answer_key_8th.pdfIn PDF document text
    • http://kisomelug.rf.gd/61954682886.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/metro_exodus_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/gigegukilerapumazibu.pdfIn PDF document text
    • http://zifasodokid.epizy.com/periodontal_disease_and_smoking.pdfIn PDF document text
    • http://fewetero.epizy.com/america_history_of_our_nation_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/best_positive_affirmations_for_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/28757148762.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/omron_hem-711dlx_blood_pressure_monitor.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/to_kill_a_mockingbird_summary_chapter_20-31.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 5176 bytes
SHA-256: db81b65724ea2143b365c3bf16078c770a4b2e865cf9d65bd85433d8d4cdd4c3
font_01_sfnt_off00011790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11790 11212 bytes
SHA-256: 3c9bad2a10fd762bedf60232811a1596a0162676062a7740894e69ebd2a58f0d

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