Malicious PDF — malware analysis report

Static analysis result for SHA-256 920ba4b928b15131…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 22:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 248518fcfd632d81c1d7039247830c41 SHA-1: 87caec7e78c60adf5375196b3e9d792b7b50f435 SHA-256: 920ba4b928b151316bba3f8a9c4e883eeb53ca5e3c164b49d0b761294de7683d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure related to game hacks, specifically for Coin Master, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or redirection attempt to a malicious site, likely to download further malware or conduct credential harvesting.

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-haktuts-game-hack PDF link annotation
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/tiktok-free-overlays_GM835599320.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-pokeballs-2021_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-roblox-clothes-boy_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_off000051e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E7 24708 bytes
SHA-256: 9e9bbb6c10358c6bcc768ce78a842604185209c0f12d2730b07fa706017be2fb
font_01_sfnt_off000089a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A2 17856 bytes
SHA-256: 75071ac62cf1f8e63970abc485880b2afc9ed082c679e94b51aa601dbd55dd98

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