Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac5cb6f75c0f8ea…

MALICIOUS

PDF

81.1 KB Created: 2021-03-22 02:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50bbfb8ccf021b9c9dc0a0487a8e5c2e SHA-1: 520c74e0f9a7c550dbff88ad049dcc2b73ea9032 SHA-256: 7ac5cb6f75c0f8ea24dfffcecad1a26ad6d463c9cd598e907db0548cee0ecd78
104 Risk Score

Malware Insights

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

The file is a PDF document that contains an external URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The presence of a download button heuristic further suggests a phishing or malware delivery attempt. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=dise%25C3%25B1o+de+vigas-columnas+en+acero
    • http://romikemixukoj.iblogger.org/tepufedawo.pdf
    • https://sazaburesifug.weebly.com/uploads/1/3/4/2/134265765/vanupepokixabo.pdf
    • http://bapozuwemixad.22web.org/fluorescent_ballast_replacement_guide.pdf
    • http://vadosixajobirug.mygamesonline.org/toyota_camry_2020_price_in_canada.pdf
    • https://cdn-cms.f-static.net/uploads/4371265/normal_6027f81704e73.pdf
    • http://kesuvajeb.scienceontheweb.net/what_is_the_secure_5g_and_beyond_act_of_2020.pdf
    • http://dosaxixapaxa.medianewsonline.com/wojazatutuja.pdf
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/6175462.pdf
    • https://gusumumonabol.weebly.com/uploads/1/3/0/7/130775475/laxatapakam_fagufofomo_denejomelelukap.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_604de32a5791d.pdf
    • https://koxofekidoponu.weebly.com/uploads/1/3/3/9/133997415/8525043.pdf
    • http://somubuzesixuwun.getenjoyment.net/84389242591.pdf
    • http://zevibeponakat.getenjoyment.net/76372453500.pdf
    • http://tezuveripoxub.mypressonline.com/the_bronze_horseman_paullina_simons.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bibesatu.epizy.com/diploma_mechanical_engineer_jobs_in_dubai.pdf
    • http://suwedafi.epizy.com/sekonic_l-758dr_digitalmaster_inkl._rt-32_modul.pdf
    • http://rumalitufe.rf.gd/zizejuwetulisaju.pdf
    • http://zikoliduxa.atwebpages.com/71456602310.pdf
    • http://tofezaniv.rf.gd/wavonezofudobujigozuw.pdf
    • http://jopizegumi.rf.gd/elegie_faure_sheet_music_cello.pdf
    • http://fivexuto.rf.gd/76437408227.pdf
    • http://fuluxewamotate.atwebpages.com/it_project_management_documentation_templates.pdf
    • http://foxukekamusun.onlinewebshop.net/bikini_body_training_guide_1._0.pdf
    • http://memujagitukeza.epizy.com/sotetamijijixolo.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_off0000fbb9.bin
7fd2482038a9278d915d16eade4a05dceb7f9e9e965fc60537577fe39b71490a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 5560 bytes
font_01_sfnt_off00010e5c.bin
de595f08abe761d18c7d5fdf37934b045148a1b45d2797d7c47bbec18d0e83e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5C 12100 bytes

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