Malicious PDF — malware analysis report

Static analysis result for SHA-256 59dfb02440defdd1…

MALICIOUS

PDF

71.9 KB Created: 2021-03-27 19:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e216b3962c9f8a09a6d1536899d4cbf SHA-1: 911c27c2ce19f9dad719bd6b660ef66f2dcb2e3f SHA-256: 59dfb02440defdd1abded7442fb6f4e8a37c7b096af7f0ba336435c0e5d73e3d
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, one of which is a direct link to a download, and a heuristic firing for a visual download button. The document body, though heavily obfuscated, suggests a lure related to downloading software, likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=new+super+mario+bros+2+apk+free+download
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/lidijumefag-nenifetawi-sawedodobeda.pdf
    • https://static.s123-cdn-static.com/uploads/4424933/normal_5fdd7c27f0f8c.pdf
    • https://cdn-cms.f-static.net/uploads/4473640/normal_604702bb0f20e.pdf
    • http://rumafelaneli.mygamesonline.org/bajisedurotuga.pdf
    • https://cdn.sqhk.co/pobopuwubox/i7nveO5/zikeja.pdf
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/nogika.pdf
    • https://cdn-cms.f-static.net/uploads/4484804/normal_602411ea22e74.pdf
    • http://beririka.scienceontheweb.net/wigosizewidavepeji.pdf
    • https://cdn-cms.f-static.net/uploads/4422133/normal_604151308eda0.pdf
    • https://static.s123-cdn-static.com/uploads/4390068/normal_5fca803cb5978.pdf
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdf
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/wemumuxev_ravelotutata_dotukuxi.pdf
    • https://cdn-cms.f-static.net/uploads/4489853/normal_60565bf589788.pdf
    • http://vosojivaru.mypressonline.com/calculus_early_transcendentals_11th_edition_solution_manual.pdf
    • http://xegazinijitup.mywebcommunity.org/super_mario_land_3ds_cheats.pdf
    • https://cdn-cms.f-static.net/uploads/4417807/normal_60175d8e6cf3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/davolazupivowi/puwim.pdf
    • https://s3.amazonaws.com/dipafuxe/what_does_not_contemplated_mean.pdf
    • https://s3.amazonaws.com/gogonof/tinotilulimilidomumemopel.pdf
    • https://s3.amazonaws.com/mogipegi/77963615916.pdf
    • http://kapirexazi.onlinewebshop.net/27011539385.pdf
    • https://s3.amazonaws.com/gawabog/perejo.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_off0000dab9.bin
17bddffa1815caa0fe4be5d5fb993ae7beeb596fb14d8be8ee73cc9da26fea63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 5584 bytes
font_01_sfnt_off0000edb3.bin
d2f107da94eb4dece6f4ac71295c1f3cb143d5cff28c838536a5872c23754fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 10632 bytes

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