Malicious PDF — malware analysis report

Static analysis result for SHA-256 561f182b92ee350e…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 06:22:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1c577efcc2be3833b6869949ac1fe793 SHA-1: 9f00931a663d9983e7b7ffe0e5ac59389d259ccc SHA-256: 561f182b92ee350e0e1c966244ab913db252376279c60e6c13db7ecf37e86bb9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document employs a lure related to "Coin Master Hack" and "free generator" to trick users into clicking malicious links. The document explicitly requests recovery secrets or private keys, indicating a phishing or credential harvesting attempt. The embedded URL leads to known malicious redirector infrastructure, further confirming the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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-no-verify-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_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_off00004eff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EFF 25068 bytes
SHA-256: 2e00f96462696a77fd8127caff1fe130f45966357b88f341e5b9e39c646b14af
font_01_sfnt_off000087be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9170 18032 bytes
SHA-256: 54638c529080804e5acac8de7a55685f76245eef83df4e09abff776108167d18

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