Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffce03ddaed2eef…

MALICIOUS

PDF

396.9 KB Created: 2022-06-03 08:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 0911f46fe34f1d2c5dd358975ad94fc0 SHA-1: 4e54cd827a0bc5d41e9bf9b001455ca94982c05c SHA-256: dffce03ddaed2eefe1f875bf19a5bfff9dd1f19e2b7674988ca9a062ec93c277
104 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript and external URIs, flagged by ML classifiers and ClamAV as malicious. The primary malicious indicator is the embedded URI pointing to a phishing domain, likely intended to trick users into downloading further malware or submitting credentials. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6197

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://yubit.co.za/XSRYdR1H?utm_term=structured+programming+using+c+pdf++pdf+files
    • http://ns03.duehost.com/js/ckfinder/userfiles/files/65798361266.pdf
    • http://bobas24.pl/Upload/file/ledagageb.pdf
    • https://gedinabudi.weebly.com/uploads/1/3/0/8/130814056/2718c31679ae7.pdf
    • https://vajuwapokovis.weebly.com/uploads/1/3/4/3/134361820/63231.pdf
    • http://casadiriposoronco.it/admin/data/files/files/50645317668.pdf
    • https://sportuna.be/ckfinder/userfiles/files/wazox.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/c1f262626ac3c50d44e03c39343a0a52/wetalelerijo.pdf
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/38205842617.pdf
    • https://kosituvote.weebly.com/uploads/1/4/1/2/141279504/sewuda-juwudujajevaj-pedosonuvo.pdf
    • https://kampusogrenciyurdu.com/file/27612462530.pdf
    • http://phutunggiahungoto.com/uploads/files/61378056908.pdf
    • https://hygienika.sk/userfiles/file/menakiredadade.pdf
    • https://anthonygillant.com/userfiles/file/25954565960.pdf
    • https://nonotuwar.weebly.com/uploads/1/3/4/6/134612914/defotivowis_sukuramiruf.pdf
    • http://enjoy.sk/editor_uploads/system/files/tasasakupese.pdf
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/fuzadesuru-mixovumox-rudibuju-zerorinova.pdf
    • http://kgpms.org/kcfinder/upload/files/verisul.pdf
    • http://jfhconsultancy.nl/userfiles/files/55144003423.pdf
    • http://kalkulacka-hypo.cz/userfiles/files/97954613221.pdf
    • http://parafiasadkowice.pl/pliki/futowisijugebidisi.pdf
    • http://eunlocker.com/Images/Editor/file/rimovewuduzalusodo.pdf
    • http://ros.by/ckfinder/userfiles/files/roroko.pdf
    • http://marcelponjee.nl/ponjeefiles/file/zovotebatuwavokuf.pdf
    • http://pulaibao.com/userfiles/files/batafazenuzobuk.pdf
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/kulixiwizoxolofale.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/rubukajuferasubuk.pdf
    • https://caraudioshop.ro/mm/file/31382399664.pdf
    • https://zitifulopesere.weebly.com/uploads/1/3/4/7/134722705/65e6e.pdf
    • https://pmb.unimal.ac.id/assets/plugin/kcfinder/upload/files/gatunalupevenizilove.pdf
    • http://maulich.vn/attachment/files/jufemadubazuputaroraxepi.pdf
    • https://vetidemilutuzu.weebly.com/uploads/1/3/4/4/134492936/fotumapowevuwon_kevatetudofu_wafav_wodak.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_off0005c49f.bin
3343780c376bf2c6426d40ace5810ddd13f3a2dbf746f0cd932670c7cee0b3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C49F 17260 bytes
font_01_sfnt_off0005f225.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F225 16792 bytes
font_02_sfnt_off00060a3c.bin
1503d7e4515d7cc3f84626aa111d6a7f4a17bed7c7bf262e10db362232c84f07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3C 11136 bytes

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