Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfa005fd7d013f2…

MALICIOUS

PDF

43.6 KB Created: 2021-06-13 22:48:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 684b7a73ff0c67cba7c2e0943c2a5e1f SHA-1: 543aacd5f08d739f62d88f27114bca4ec39d8571 SHA-256: 0bfa005fd7d013f2c1c2e8107cac48d88456200318e6c5ea7077e245ec3136ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a 'free generator / game hack' which is a common lure for malicious redirects. The document body, though partially corrupted, contains the primary malicious URL and other related URLs that likely serve as landing pages or further redirection points. The presence of multiple embedded URLs and the critical heuristic firings strongly indicate a malicious redirector workflow designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.co/app/431946152/hack-roblox-rocitizens-dinero-infinito-game-hack In PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-apk-download_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_003_off00004d50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D50 25148 bytes
SHA-256: b4c0b80abe8fa987c42bd62ab0c346b5bff83729e6dc8005457275685e4705dc
font_01_sfnt_off000086fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FB 18656 bytes
SHA-256: bbc6ea9d716095715e97634cdb04770ffb68749e1a20f7db60f810daeed7b5c1

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