Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef6a4e9d51cd439…

MALICIOUS

PDF

372.3 KB Created: 2022-05-23 21:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 8426b509677fb1787b109fe0010b13a0 SHA-1: d0057bb0099622acf4df09e4df451ad39eceba65 SHA-256: fef6a4e9d51cd439cfbcf2df6ac84bdaae744cacb0aef77116a8a9e81ebf8d8a
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains an embedded JavaScript stream and an external URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged the PDF as malicious. The embedded URL likely leads to a phishing page designed to trick users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5459

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
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sunuf.co.za/XSRYdR1H?utm_term=cycle+de+rankine+exercice+corrig%C3%A9+pdf+pour+un
    • https://nematoluzi.weebly.com/uploads/1/3/1/4/131409841/9177822.pdf
    • https://xezedofebeke.weebly.com/uploads/1/4/1/4/141449507/492556.pdf
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/dajamilumidex.pdf
    • https://losezereveki.weebly.com/uploads/1/3/5/2/135296388/tufiles-loxipi.pdf
    • https://tubidurifubadas.weebly.com/uploads/1/3/4/8/134885002/mewavisafadofax_jumogafeve_timokasobejaren_jimize.pdf
    • https://jozisanolotodix.weebly.com/uploads/1/3/0/9/130969335/pobetufodoje.pdf
    • https://kadikodol.weebly.com/uploads/1/3/4/7/134747526/rigamer.pdf
    • https://rokumora.weebly.com/uploads/1/4/1/3/141328313/6900029.pdf
    • https://domomizidum.weebly.com/uploads/1/3/4/2/134235459/3745498.pdf
    • https://wepigadewa.weebly.com/uploads/1/4/1/5/141563560/nopuxeli.pdf
    • https://rowumojonudelaz.weebly.com/uploads/1/3/4/3/134335227/timup.pdf
    • https://rokumipizo.weebly.com/uploads/1/3/0/7/130776068/8832603.pdf
    • http://flexibordj.com/app/webroot/js/kcfinder/upload/files/75963206396.pdf
    • https://wabudimile.weebly.com/uploads/1/4/1/6/141601399/c19ee0ab6c2de4e.pdf
    • http://ktimavoyatzi.gr/images/files/files/32072286948.pdf
    • http://reputesystems.com/app/webroot/uploads/files/93459549254.pdf
    • http://conf.uml2.ru/kcfinder/upload/files/nopidek.pdf
    • http://forsheda.se/admin/kcfinder/upload/files/86835496003.pdf
    • http://sakurahoaanhdao.com/webroot/img/files/88127247609.pdf
    • https://boyanbolyarski.com/userfiles/file/83448119550.pdf
    • https://pafirovax.weebly.com/uploads/1/3/4/6/134662293/2935864.pdf
    • https://okul.gencreklamajansi.com/uploads/files/61903957960.pdf
    • http://www.childofafrica.org/media/userfiles/file/73117582204.pdf
    • https://guparamoribum.weebly.com/uploads/1/3/2/7/132711937/fc9dd4d3e012d.pdf
    • http://checopharma.com/upload/files/wolanotinavepojajidusimal.pdf
    • https://boruwimuruliv.weebly.com/uploads/1/3/4/8/134875556/6869597.pdf
    • http://francsmaconsdefrance.com/www/files/35713923196.pdf
    • https://advantage.ee/media/contents/file/mefazimaraligu.pdf
    • https://makurabun.weebly.com/uploads/1/3/4/6/134651698/mawir_pitunamebota.pdf
    • https://felezawobo.weebly.com/uploads/1/3/4/8/134896203/fugog_titemeb.pdf
    • https://artlabjo.com/userfiles/file/39196094433.pdf
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/dufop-xelitibafigupi.pdf
    • https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/9acc7.pdf
    • https://xukokamil.weebly.com/uploads/1/3/4/3/134317204/likuzofanukix.pdf
    • https://dumuwikodopod.weebly.com/uploads/1/3/4/4/134458554/1759427.pdf
    • https://nefipoxitusi.weebly.com/uploads/1/3/0/7/130775115/9883349.pdf
    • http://closehorses.com/userfiles/file/xixekewejiv.pdf
    • https://gomufutezenufi.weebly.com/uploads/1/3/4/6/134677359/990cf4.pdf
    • http://smartpaintingplus.com/userfiles/files/54599519538.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://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_off000558d5.bin
40a46b5b737c6a8e7d1a735ee37233c5263eb06cea872ac5b6448a72f424ca2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558D5 11124 bytes
font_01_sfnt_off0005726a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5726A 16792 bytes
font_02_sfnt_off00058a7e.bin
81fa0bb19b8fff34569d12fb35eaad303ad9273ccfbf4583c03c23c37a98c45f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A7E 20208 bytes

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