Malicious PDF — malware analysis report

Static analysis result for SHA-256 587490248fc2e806…

MALICIOUS

PDF

77.0 KB Created: 2021-04-28 00:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9438d53e476ad768bc616b944d20e233 SHA-1: 51093be889b9dc6c2fe61ebd870c503e0d8f60a0 SHA-256: 587490248fc2e806702649d28d8b5690e9246788f1cdd799768547b2ed752978
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to contain metadata related to printer error lights, suggesting a lure to disguise the malicious intent of directing the user to a potentially harmful URL.

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://leonvi.ru/strik?utm_term=hp+laserjet+p2015+series+error+lights
    • http://rixuliketasaban.mywebcommunity.org/how_much_does_an_electrical_engineer_earn_per_month_in_south_africa.pdf
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/46f5184fc.pdf
    • http://supernefritroller.xyz/geometra_plana_y_trigonometra_baldor_ejercicios_resueltoshx3du.pdf
    • http://ritegifufefut.scienceontheweb.net/worthy_is_the_lamb_lyrics_and_chords.pdf
    • http://jukejed.mypressonline.com/nutazunojuviki.pdf
    • http://potuxoposutu.medianewsonline.com/kojixuxavigisipewur.pdf
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/3a61c34.pdf
    • https://kakexesasag.weebly.com/uploads/1/3/4/6/134614155/7058491.pdf
    • http://pixelbarista.com/rational_male_religion_booklet0x.pdf
    • http://fofiwafajelerax.sportsontheweb.net/64135670862.pdf
    • https://fijuzezakuxulow.weebly.com/uploads/1/3/5/3/135391315/201898.pdf
    • http://sewawena.scienceontheweb.net/saddleback_educational_publishing_basic_english_grammar_book_2.pdf
    • https://neposuxanu.weebly.com/uploads/1/3/0/7/130740617/voziguzosiv_buxomamiwudiwap.pdf
    • http://simultaneously.space/khalil_gibran_el_profeta_sobre_la_amistad6setp.pdf
    • http://gikilebi.iblogger.org/87444067561.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bugazepoja.onlinewebshop.net/padelo.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/what_is_limit_in_calculus.pdf
    • https://s3.amazonaws.com/waxegatulo/mazopa.pdf
    • https://s3.amazonaws.com/lonozote/xodilugelukote.pdf
    • http://podadoperis.rf.gd/convention_budapest_cybercriminalit.pdf
    • https://s3.amazonaws.com/xeponodij/63930409857.pdf
    • http://bepopesaral.rf.gd/fisinulesavumumukexu.pdf
    • https://s3.amazonaws.com/kigavanus/buick_verano_2015_performance_parts.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_off0000ed08.bin
cee35133720b0ed47497b27d65ab2ba45ca845ff9cf9c89843b55c5a3404b6be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 5568 bytes
font_01_sfnt_off0000fff8.bin
9852627d22fbba8db86d029d681754f5eb96b52fbb92b43666ca8849f58f94cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 11176 bytes

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