Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b92d58b121906c…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 22:35:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 430b5ad8b2ea21039a2d346e90cf1ccc SHA-1: c9077aa1178ae406c9a1479bc5b76631cb023cb5 SHA-256: 39b92d58b121906cee538ddb7b1cf83ea8be378dc45c1ac90aa86eaa0654fb95
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/free-coins-and-spins-coin-master-2021-game-hack PDF link annotation
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/my-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-hack-version_GM406889139.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_off000052b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B1 24472 bytes
SHA-256: 715daf560393cf279fd07f978bc9057772859397adc7dba08dea782c7c8859aa
font_01_sfnt_off00008af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF7 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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