Malicious PDF — malware analysis report

Static analysis result for SHA-256 b303b9bf2742043e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-08 20:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23fbaa17de69d2d594a474c8ebac822e SHA-1: edea3da1dab2b2dbb57e4bc9cc722fc3e11a22c9 SHA-256: b303b9bf2742043ea5c51b930dd6fdf9a1cd5ea5908401066b4dcddc2494df95
104 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to 'xezojetit.ru', which is likely a phishing or malware distribution domain. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/award?keyword=objective+computer+awareness+book+pdf+free+download
    • http://fezufizibum.mypressonline.com/canticle_of_the_sun_music_sheet.pdf
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/mewozewovivole_nasubonakisug_wenekup_pomulaz.pdf
    • http://foripekomufotir.mypressonline.com/first_alert_co400_carbon_monoxide_detector_battery_operated.pdf
    • https://sadaxolofomet.weebly.com/uploads/1/3/1/4/131453623/gowifilez-wupapusevoji-gajanizegejoba.pdf
    • http://beviluxenumiliv.mywebcommunity.org/como_crear_un_de_varios_documentos_word.pdf
    • http://gililofus.medianewsonline.com/dugegafa.pdf
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/wevuj.pdf
    • http://terugate.mypressonline.com/18484247144.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wasupudunufol.rf.gd/nuvupawolirevunadibudi.pdf
    • https://s3.amazonaws.com/rujimidujek/88423584177.pdf
    • https://uploads.strikinglycdn.com/files/dbf573b2-1344-43d6-8a62-a9f448fd49a9/17892137312.pdf
    • http://zapesuxeliribi.rf.gd/hamlet_1996_movie_download_480p.pdf
    • http://bividit.rf.gd/pidat.pdf
    • https://s3.amazonaws.com/sizadagazagaj/fbise_date_sheet_hssc_2019_part_2.pdf
    • http://dijuvunote.onlinewebshop.net/zezebewezosadat.pdf
    • http://jowokepo.atwebpages.com/4811047450.pdf
    • https://s3.amazonaws.com/timituvupame/popitowurij.pdf
    • http://baxovebiw.rf.gd/68556611610.pdf
    • https://uploads.strikinglycdn.com/files/60c5666a-25d8-4093-9ed2-c66911cdcbc7/what_foods_contain_gluten_and_lactose.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_off0000efed.bin
22848d6a47b3df21b54243961d5c51556d3606076735f77a7a7969c2d1b2c00b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 5760 bytes
font_01_sfnt_off00010388.bin
598e63252f9c50679670aaaa0c604fbbd692e32ac3526e8a31b285152ca94235
pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 10364 bytes