Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7c5aac0c463e5c…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 17:34:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2b7f257b51ff9c0d5c58566efa039c79 SHA-1: 8943ba839c791be11f4655d7bab207e334f81e61 SHA-256: 1a7c5aac0c463e5c73aa86f381cadb3623526166ce511dfabff746f091e11a84
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 0.9864

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.tw/app/431946152/how-to-get-past-free-robux-roblox-hack-survey-game-hack PDF link annotation
    • http://feuerwehr-rheinau.de/images/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-batu-kol-faki_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/cheat-roblox-offensive_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-hacks-2021_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_off00004f98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F98 26540 bytes
SHA-256: ab9f79b228285f8550a76600951313a6989c8ed476d232f275516e61f8379703
font_01_sfnt_off00008d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 19200 bytes
SHA-256: 8dee87f2e22294042c5c9168b6a390ef1736f833fd79ffa796210d8911248b69

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