Malicious PDF — malware analysis report

Static analysis result for SHA-256 6599070b5a64fa45…

MALICIOUS

PDF

79.3 KB Created: 2021-03-22 01:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 646178fdb6a6561e3c311d3464473975 SHA-1: eb0873be58f716347a5470fa23f673d66eac27ed SHA-256: 6599070b5a64fa4521af2891d0165cc5b08c17a8f7d0902ce77ce0ad551fc2fe
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to academic worksheets, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=practice+writing+hypothesis+worksheet+answers
    • https://figunetu.weebly.com/uploads/1/3/4/3/134353482/cecdaaf48.pdf
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/2082064.pdf
    • http://avto-trokot.xyz/deckers_fishing_report_orvisu1tue.pdf
    • http://fkpravo.ru/78512593274ju8hi.pdf
    • http://rekugegik.scienceontheweb.net/stalker_call_of_pripyat_guide.pdf
    • http://renijulemigato.iblogger.org/online_marksheet_correction_rajasthan_board.pdf
    • https://wuginimujewege.weebly.com/uploads/1/3/4/7/134714977/fanabu.pdf
    • http://biomanix.best/zosodox8qg7.pdf
    • http://accface.in/best_travel_guides_for_paris_franceomhfc.pdf
    • http://fosonelotila.medianewsonline.com/59117493848.pdf
    • http://xinegibifupa.iblogger.org/burisawogajozigova.pdf
    • http://bumufirila.mygamesonline.org/search_engine_optimisation_starter_guide.pdf
    • http://unreguezff.rest/30252467765x6eqz.pdf
    • http://zutolewe.mywebcommunity.org/pozadarufabatinedumad.pdf
    • http://mysteps.online/japan_travel_guide_free_downloadhtyl3.pdf
    • http://idslim-italia.site/26684610727v1ia1.pdf
    • http://trynon.xyz/33609715925xtaft.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dovunufesesiz.onlinewebshop.net/fazoluzipa.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_off0000f81d.bin
b0f9f18e33b44c1b9707b88e41f3454723ac824b7514ec4f7a7e2facbdb400a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 5424 bytes
font_01_sfnt_off00010aa4.bin
32d918c0813947cb55fb37a7d56353be05a5cb15f7b59f701debcf8780c321be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA4 10968 bytes

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