Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb1275fcbf3e9d3…

MALICIOUS

PDF

46.5 KB Created: 2021-06-06 23:27:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b2d73a809fdf8e07896201ede7afca1 SHA-1: 730f16177f2ace70e10dc7f03a9ec7ef708acd15 SHA-256: 0fb1275fcbf3e9d3248932f24dafe93876ba5f9fea896800055a50943e28fb83
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency and hacks, directing users to malicious redirector URLs. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/hack-that-thing-how-to-get-free-robux-game-hack In PDF document text
    • http://acktivities.com/images/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/oginject-co_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/cheat-codes-for-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_off00004efc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EFC 29128 bytes
SHA-256: d18404d7ee792a33f64654bd55f3b2dfbd6e5a374ec59ee3e264610dba399e7b
font_01_sfnt_off00009077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9077 19256 bytes
SHA-256: 89bd7ed8fd2fe1732fec571d289e1b7781c60d655bca63a81c131aac566cd987

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