Malicious PDF — malware analysis report

Static analysis result for SHA-256 956e279ba78095cc…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 22:46:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06ae11a5dab86abd3dea8da2000115b0 SHA-1: 11ca2c16a44fab07e6f2b30a591fae117d1491fb SHA-256: 956e279ba78095cce603522c305a3cd14872aee86dc59b227aa6500c27bcabf3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free money' to entice users. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/apps-to-hack-coin-master-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mm2-hacking-vim-roblox_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_off000053a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A3 25488 bytes
SHA-256: 9ab7d48f4f3110fd49e3b65fd92fba6a81c68b63dbfa9a9a752484b011d745f7
font_01_sfnt_off00008ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 17892 bytes
SHA-256: ec9c2c954b0ae415002c25bf965fc53f3e3020b30477345a3b66b9e13b139acf

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