Malicious PDF — malware analysis report

Static analysis result for SHA-256 99828a5bbb3eae7c…

MALICIOUS

PDF

45.1 KB Created: 2021-06-08 15:14:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7b91c6636b5032dfd47add439f5b860e SHA-1: e7c6ce9407fcd1148812a721fe26e681f1e08578 SHA-256: 99828a5bbb3eae7cf342aa923b5731da6cb824dc83bb9ff0c29ab9de8cde6a8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free item generators. The primary lure directs users to 'https://netcdn.tw/app/431946152/how-to-get-free-items-in-roblox-dominus-infunes-game-hack', which is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attempt 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.tw/app/431946152/how-to-get-free-items-in-roblox-dominus-infunes-game-hack In PDF document text
    • http://halitbayramoglu.com.tr/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/corn-master_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-hack-roblox-jailbreak-walls_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-minecraft-coins-for-free_GM479516143.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_off00004eb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB5 27152 bytes
SHA-256: 424b467c2d63a26147c9b06325b100151c4ddc521ab0fa868ec4f554ae98dd8d
font_01_sfnt_off00008be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE6 18904 bytes
SHA-256: fd9568d58ce40986684c5a68254688da81c1217652f5dc7851065c91b46ec233

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