Malicious PDF — malware analysis report

Static analysis result for SHA-256 6828bef12cd83e16…

MALICIOUS

PDF

33.4 KB Created: 2021-06-26 10:59:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26c3db611aa07f7678daa8fadaf6b252 SHA-1: e8fe24afafbf9f37bccf4584a682f53826d440f3 SHA-256: 6828bef12cd83e1607a6e2b189874cfe9103072e42d756c1e001d089467ea3fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as lures for game hacks and free currency. The ML classifier also flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to host or chain to a further malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/admin-command-roblox-hack-game-hack In PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-hacking-simulator-codes_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/rblx-gg-robux-generator-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/robux-com-for-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-was-hacked_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-roblox-stuff-2021-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-free-downoad_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/2021-000000-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-admin-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_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_off00002bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBE 22320 bytes
SHA-256: c069ab06e9f42cfc9188a7674c8157fe48686c65ad60bbb704fcada69d71cc9b
font_01_sfnt_off00005d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D72 19208 bytes
SHA-256: ba2069f41bffe0756f9c7b87202760fd05b353643164b0b69d6bcea7e6a0a1f1

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