Malicious PDF — malware analysis report

Static analysis result for SHA-256 caeb359f79ff1b10…

MALICIOUS

PDF

77.5 KB Created: 2021-03-27 21:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54f4eb0d466557a344547ee38a45d4bc SHA-1: 56c260d68881f1f5edb5894266d3c6cfa27925ba SHA-256: caeb359f79ff1b1090302a8f00b5d1fdc28c6305475e370bc46bc667083e7463
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a URL related to a Samsung washing machine error code, likely as a lure. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. The presence of embedded URLs suggests an attempt to download further malicious content or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/aws?utm_term=samsung+top+load+washing+machine+error+code+dc
    • https://cdn.sqhk.co/jawutuwek/cCTDLgf/podimosezulalovej.pdf
    • http://tefitagesev.mypressonline.com/bojigaxab.pdf
    • https://cdn.sqhk.co/fusexabuvej/7vjhGjv/bagapalibuzonufez.pdf
    • https://cdn.sqhk.co/novitovikor/gfjaijB/fesegerubusin.pdf
    • http://kaxidabifibag.iblogger.org/strategy_implementation_report_7_steps_example.pdf
    • https://cdn.sqhk.co/wepigosogo/jeSJjaV/dragonsky_idle_merge_apk.pdf
    • https://cdn.sqhk.co/kubepugemaki/kutsWih/1800323840.pdf
    • https://cdn.sqhk.co/letabuner/gibiggR/huawei_themes_app_apk.pdf
    • https://cdn.sqhk.co/barosevarega/7M7iaZg/defogagirinalopevaz.pdf
    • https://cdn.sqhk.co/vogoxaginoje/gifiijj/tinidumikokajawa.pdf
    • http://votexetoke.iblogger.org/asca_national_model_4th_edition.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tesotiwapax/97125351440.pdf
    • http://bolirazebaf.myartsonline.com/jekutaxekuju.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/21040932013.pdf
    • http://solugivewatewa.myartsonline.com/42012495562.pdf
    • http://lukafimagog.atwebpages.com/banutusowujejabimumazew.pdf
    • https://uploads.strikinglycdn.com/files/0ad43e87-ced1-4a0b-8b50-5e16f7454089/bently_nevada_3300_xl_5_mm_proximitor_sensor_manual.pdf
    • http://sabaramofedofi.rf.gd/modelo_pedagogico_definicion.pdf
    • http://viwudajokufado.atwebpages.com/84968338882.pdf
    • https://uploads.strikinglycdn.com/files/aeba16d1-61ff-40bd-b4a5-cc1525d328e2/what_do_colors_mean_on_snapchat_map.pdf
    • https://s3.amazonaws.com/donarepemi/kefupizopawo.pdf
    • https://s3.amazonaws.com/novifamigot/midejomofelugoxubemimoxax.pdf
    • https://s3.amazonaws.com/xubifupi/vizowebuxejojaduzi.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_off0000ed90.bin
179fd0d32401438437039bb2d2d83bc25b7fe614e7a14bf0605acfa18a3a4718
pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 5680 bytes
font_01_sfnt_off000100d5.bin
846f18affe3a066fc86359e56337cef7b3c4eece3673f3cb6b37a7c6828edd5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 11540 bytes