Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a6a11479c450dc2…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 22:38:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 09dacbcff80779effe5f9642191a09d9 SHA-1: 8c0ef27eda90a7515743641f0aa8fb17fb03bc5a SHA-256: 4a6a11479c450dc264ceb3e44761c16e8ee19e262b489df48bd6b6482c0bd920
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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://netcdn.online/app/406889139/coin-master-daily-link-game-hack PDF link annotation
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/collect-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B7 24728 bytes
SHA-256: 8a7facbff1a88259eb575772f34b960b3d3755388c2fbd87e278b52948a23a3f
font_01_sfnt_off000088ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AB 18136 bytes
SHA-256: de8adbae9b98791aafa7b1c9845ab8ec9bced530f59257e9f1ec036c02100ceb

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