Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4dfca3e5f2afb1…

MALICIOUS

PDF

45.4 KB Created: 2021-05-10 18:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9e5fffdc3ba88fafc54313c2e685ccd3 SHA-1: de76d7dfa4f73e468d9e6eb2dac6045975bbb8a1 SHA-256: 0b4dfca3e5f2afb14180cdd6500d4506ce40cc517756c080325db7d30079aac1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious infrastructure, specifically designed to lure users with game-related content. The primary URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/coin-master-free-spins-link-2021-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-link-download_GM406889139.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_003_off0000492b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492B 27008 bytes
SHA-256: d16896f93c73277f98ebf9da5558e4fb33e5a26bbe3f39414d9aaa6286b7eba5
font_01_sfnt_off00008450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8450 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3A 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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