Malicious PDF — malware analysis report

Static analysis result for SHA-256 b935a88ac6648e9f…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 13:54:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ae9679ab539aaf0e2caac9619f9a1cad SHA-1: 4571379070951df3018b5c9806d9f6230248f46d SHA-256: b935a88ac6648e9fdc9a4c2d6bf056c3b09fc83735f5e381ead85337046beae9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent link to a website offering a 'Minecraft Hacked Client'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for malicious purposes such as distributing malware or leading users to phishing sites. The presence of download-related text further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/best-minecraft-hacked-client-game-hack In PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-get-free-robux-no-human-verification-moblie_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/real-robux_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/john-doe-roblox-hacker-wikipedia_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/adidas-tracksuit-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/cheat-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/roblox-hack-robux-android-2021_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
font_00_sfnt_off000031f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F7 21852 bytes
SHA-256: ff9425d960d6fef0a278999b181fd9cd67786d3cac02119390d18cd2ff2ec007
font_01_sfnt_off00006228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 18492 bytes
SHA-256: 86296843b88eed25728c8cc075b43780ca1cc7c9d5e807804b99454961e5616a