Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a016db9e5d62f62…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 16:11:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 019db7e01e6a05ee5eb0488b7bf62872 SHA-1: 3d8d880c2f7e2e309a49058230a3e06ef2ac2182 SHA-256: 5a016db9e5d62f629bee565862292f0f6d1a3f16546219cf3c9633af7ca0cb80
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising game hacks and generators. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users with enticing content to click on these malicious links, which likely leads to further exploitation or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • 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.
  • 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.tw/app/431946152/hacker-vs-noob-vs-pro-roblox-game-hack In PDF document text
    • http://jjpremiers.com/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/worst-client_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-50-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-girl_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_off0000521b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x521B 28376 bytes
SHA-256: 3856add46ddb4787c820605f9d13fa6444408979d265a26de013493ebb502bb2
font_01_sfnt_off0000927e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927E 18472 bytes
SHA-256: c12beb17b2b06739400bf6a95e518c4c9c9ae9de76ddbafc7f04f4d5994a71d8

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