Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a861fe1ece48de8…

MALICIOUS

PDF

42.9 KB Created: 2021-06-11 10:39:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7bd988251c17536883abd80122b441ac SHA-1: c8fb823fd8eb503fa575937b58e7b93dde32c79f SHA-256: 7a861fe1ece48de8ac5618fb4fa1ac46f758332bb57c99771252d3a705f960e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to known malicious infrastructure, masquerading as a game hack or generator. The document body, though heavily obfuscated, contains references to URLs that are likely part of a phishing or malware distribution chain. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/479516143/minecraft-free-computer-game-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-gift-cards-list_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cheat-engine-and-ccv5-bypass_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/greg-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-easy-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-walk-through-walls-in-roblox-jailbreak-no-hacks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-spins-in-coin-master_GM406889139.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_off00004f59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F59 24340 bytes
SHA-256: 094d8f20e8eb6216caffbfd6392e478194ed18c76bf40b553ea3cfceb0c087bd
font_01_sfnt_off0000850b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850B 18284 bytes
SHA-256: 652d84a18e1638f498f678590eda8b7b1302fb3a862e9e0847db70e42b725810

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