Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4b5cdd3fddbdb3…

MALICIOUS

PDF

81.4 KB Created: 2021-03-05 22:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e5bb98bd9de8088c9e6e9df409c7d7d SHA-1: 8d7f63e5e245fd8c047239ebce7f31b80545b107 SHA-256: 9d4b5cdd3fddbdb3f094125999ed48e8cccee101dc89dbd5f530b8aafb8d347f
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to 'kuzutuzo.ru', which is flagged as a potential phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'free furniture', a common tactic in phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=how+to+get+free+furniture+from+salvation+army PDF link annotation
    • https://cdn.sqhk.co/gukisafuw/jijfhav/movie_scenes_that_made_you_cry.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/bivogegivukewemuni.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/x7iiBjc/best_video_creator_for_social_media.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/wefigudexowuj.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/hGjcggm/to_the_moon_and_back_movie_quote.pdfIn PDF document text
    • https://cdn.sqhk.co/jutepoxof/j9FhaEC/fuforujo.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/ihjgDjU/cornwall_civic_complex_box_office_hours.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/mutubojepo.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
    • https://s3.amazonaws.com/nagev/nebamufofejawositupol.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/react_native_cross_platform_ui.pdfIn PDF document text
    • http://kabumaja.rf.gd/genie_silentmax_1000_programming_keypad.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/dyson_ball_vacuum_cleaner_casdon.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/siwag.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/53311510573.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/angels_in_america_full_play.pdfIn PDF document text
    • http://xupebina.epizy.com/33625408980.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/best_pmp_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/subidi.pdfIn PDF document text
    • http://nixevafuzija.epizy.com/jakoluzesezaso.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/96902674115.pdfIn PDF document text
    • http://mitudosukekunif.epizy.com/histria_do_brasil_nao_lilia_moritz_schwarcz.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_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 5184 bytes
SHA-256: 3e570d4c2af39025ba655a4b3e207e799cf1ef20c40e03e868ad3dc7b14c1395
font_01_sfnt_off000106f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 10388 bytes
SHA-256: d3a54835549535f65dc4fbc4c994a450fd11fa8b0b4b6dbfb65eb037757b4f16
font_02_sfnt_off00012969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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