Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c1049b83f5cd73…

MALICIOUS

PDF

46.3 KB Created: 2021-06-04 02:11:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 864a294cea24b3f399afcf746db0ac20 SHA-1: f62c56ddf8d3195f461aadeb269c66af0d43f2fb SHA-256: f2c1049b83f5cd731f7b977cd3e1c51288bd8382bd699823c9574e1717ae2bee
142 Risk Score

Malware Insights

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

The PDF document contains a high-risk lure for recovery secrets and links to a game hack, strongly suggesting a phishing or malware distribution attempt. The embedded URL, https://netcdn.online/app/406889139/coin-master-hack-apk-game-hack, is likely used to deliver a secondary payload or redirect to a phishing page. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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-hack-apk-game-hack PDF link annotation
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C3 25040 bytes
SHA-256: 4f1ed4bfbe170344fc5a17d1357386d88c3a9731b76a8f177f72e7ff69c785a6
font_01_sfnt_off0000896e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x896E 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9320 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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