Malicious PDF — malware analysis report

Static analysis result for SHA-256 799dd0497e30b310…

MALICIOUS

PDF

70.8 KB Created: 2021-02-10 21:26:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 71602ab75b2787ba6a72c79f0d707057 SHA-1: eeae204d2172b2c4301ec226b1cf9ec8cf288980 SHA-256: 799dd0497e30b310777ca51856109b8c736d1201c0555cbf0ee5c493d1c7f24b
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to an English summary, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=my+english+by+julia+alvarez+summary PDF link annotation
    • http://duvakemofasomig.iblogger.org/mackintosh_probe_test_report_uitm.pdfIn PDF document text
    • http://medway24.com/unicorn_pet_bed_adopt_meo8rby.pdfIn PDF document text
    • http://javatow.22web.org/basic_geometry_vocabulary_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/chgspjj/noob_vs_pro_vs_hacker_atlantic_craft.pdfIn PDF document text
    • http://nout-sale.site/wooden_surfboard_plansik88g.pdfIn PDF document text
    • http://rakajipof.22web.org/bypass_proxy_android_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/hjhbogi/nenutibiwozogisarexup.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/Qihgchg/love_island_2020_episodes.pdfIn PDF document text
    • http://dusosax.66ghz.com/xufolonip.pdfIn PDF document text
    • http://fullcreditreport.info/budexidocj0yb.pdfIn PDF document text
    • http://copyrightreports.com/padobuwujobimafinamigobp772i.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/LnSjdjb/jumojerogorelabati.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://fibejebovef.epizy.com/windows_10_image_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/hpu_student_portal_datesheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/community_acquired_pneumonia_guideline_idsa.pdfIn PDF document text
    • http://piwirapofo.epizy.com/49214324564.pdfIn PDF document text
    • http://gomupinoteripa.epizy.com/mafia_3_best_ending_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/videohive_ink_petals_romantic_slideshow.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/top_android_fps_offline_games.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/environmental_impact_assessment_eia_report.pdfIn PDF document text
    • http://xadamun.epizy.com/hey_bro_naach_meri_bulbul_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5F 5224 bytes
SHA-256: 94d3a42b5e2c978b38c65a806fa1341f17cffa0049c97350e73412751842bc7e
font_01_sfnt_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 9828 bytes
SHA-256: 4d4f1569398ad8bab455c66a5df9b59a8d270135fa090d015c3522d07904359d
font_02_sfnt_off0000ffba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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