Malicious PDF — malware analysis report

Static analysis result for SHA-256 47189a59b0836bcc…

MALICIOUS

PDF

56.4 KB Created: 2021-06-03 18:46:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5379bc08046841d60cf499511738857d SHA-1: 34ae371bbc332b5a9b3b85538c7330653b2e36ff SHA-256: 47189a59b0836bccb8d4fab2c6c9a078d19125a95b3b731909bfadc3b101ff71
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for game hacks and free currency, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded link is a known indicator of potentially unwanted or malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9650

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/collect-free-spins-coin-master-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/pokemon-go-free-codes-november-2021_GM1094591345.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53CC 25380 bytes
SHA-256: aa31d820d552934260762a5c30583d5dac72da41810ecd06fa877f3516efe260
font_01_sfnt_off00008e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E60 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off0000992b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992B 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ac50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC50 17960 bytes
SHA-256: 56908844ab102c912342fec259dbf5a97100868d5d877c05497f82053eb67f28
font_04_sfnt_off0000cd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3A 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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