Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0dcce966aca3bc…

MALICIOUS

PDF

36.4 KB Created: 2021-06-22 19:18:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3a8bdfb20ade371ec7f20acd39bd691a SHA-1: b910819cc848f781d29a994d25acf2e05a7faf8c SHA-256: cf0dcce966aca3bc2e6f98438a89da5b0864f5b5b341897437beb5cacccdb631
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator" or "game hack" lures. The document body and embedded links suggest a social engineering tactic to trick users into visiting these sites, likely to download further malware or engage in scams. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious active content designed for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/406889139/coin-master-hack-spins-apk-game-hack In PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-free-clothes-generator-2021_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-spin_GM406889139.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-accouny_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/100-working-robux-hack_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-robux-forumscom_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/moon-active_GM406889139.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-jojo-project-cheat_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-jailbreak-how-to-go-through-walls-hack_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_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_002_off0000366d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x366D 23696 bytes
SHA-256: 708ebe4f7e11f628221c1854cd790f8cdc38cea9d5b6f5feadfecfadbed56238
font_01_sfnt_off00006c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C27 18180 bytes
SHA-256: 1e953b72540ec4677b5f3a09436cf02581c7252e246dbe5ac414cafa51ba2d5d

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