Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab1bf87a17b8f10…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 12:14:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ec988468f049c91802a5ec64e839dcc7 SHA-1: d29efefce51d9b1c42ce16a3a96c95cab2b6a107 SHA-256: 0ab1bf87a17b8f10ad88bc64f020d3c894a1fc920d83070598aaebf41c3e8129
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The document body text and heuristics confirm the lure is related to obtaining free in-game currency or hacks for popular games like Roblox and Coin Master. The primary malicious action observed is directing the user to a malicious URL, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-change-your-roblox-username-for-free-2021-game-hack In PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-uploadable-images-roblox_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-on-pc-october-24th-2021_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-money-in-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-2-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-august-2021_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-bc-roblox-2021_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-hair-in-roblox-not-model_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/can-i-play-roblox-for-free_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
font_00_sfnt_off00002f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F26 22748 bytes
SHA-256: 980ae601675818bc515a8f982eeea19cc313db813d06c5ae1e3e2c0c1af184f4
font_01_sfnt_off0000624c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 19944 bytes
SHA-256: 58d5e835659902526c12094ddffc5710f83fbe2825a8f92a51b056a6b9134250