Malicious PDF — malware analysis report

Static analysis result for SHA-256 2577c904a1d939a4…

MALICIOUS

PDF

85.2 KB Created: 2021-03-25 18:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b98f271a329f92c5f20da9346981ac0a SHA-1: 503a6c9136f3bfe7525b03c6422190973f43014b SHA-256: 2577c904a1d939a41d90b1079fd73631ef6049bf4d8563ed2e31394103de8f6e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing-related trojan. The document body, though heavily obfuscated, appears to be a lure related to medical information, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jumiwimov.ru/award?keyword=prevalence+of+iron+deficiency+anemia+in+pregnancy+pdf
    • http://xemokajoled.medianewsonline.com/voxebab.pdf
    • http://novazeku.mygamesonline.org/52746756787.pdf
    • http://kolekewoni.mywebcommunity.org/nomazu.pdf
    • http://zozamowewideno.mypressonline.com/35010743410.pdf
    • https://cdn.sqhk.co/jivonaxadu/hjgji7L/97804898618.pdf
    • https://cdn.sqhk.co/dofexoxev/KhaUq83/quiz_logo_game_answers_level_1_logo_13.pdf
    • https://cdn.sqhk.co/sixojifez/ycvGLgi/fimiloz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://temitugefowe.epizy.com/curriculum_vitae_template_word_online.pdf
    • https://s3.amazonaws.com/megodipewukitoj/xapiraxowadakogosi.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/belajar_gitar_blues.pdf
    • https://s3.amazonaws.com/jemisajoda/70038323829.pdf
    • https://s3.amazonaws.com/wanasuvedigo/zefixunotipam.pdf
    • https://s3.amazonaws.com/megodipewukitoj/buzovifunepamawazezigebu.pdf
    • https://s3.amazonaws.com/pizivurapab/green_eggs_and_ham_season_2_release_date_canada.pdf
    • http://batalogafoma.epizy.com/dungeon_keeper_1_guide.pdf
    • https://s3.amazonaws.com/kizugokofo/what_is_the_difference_between_aggregate_expenditure_and_gdp.pdf
    • http://xifonefoje.epizy.com/sim_number_tracking_app.pdf
    • https://s3.amazonaws.com/tinivukedeta/gps_tomtom_go_60_b.pdf
    • https://s3.amazonaws.com/lolijexejomak/tavonuvuzididusarenifami.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_off0000f928.bin
739a048a9c8c48edef7f1777ef3940e85fb7542353e8aa656fc8069666a8e25f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 5460 bytes
font_01_sfnt_off00010bb9.bin
8a953cb040e5084f0b54f69d3af7244bca2f213ca0a016a92a0cc9797327da56
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB9 11144 bytes
font_02_sfnt_off000131bb.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x131BB 16204 bytes