Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0c4a9fb8b97d9c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 01:10:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 310e1f56d1b79a663b2bdb7f8531f78d SHA-1: 009b5c4bf70abff63791706ebaa58c9b69391703 SHA-256: 5b0c4a9fb8b97d9cd9f6873b73f30fcbf37a19a7817c06c2837130c4dc70e100
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF as malicious. The primary lure appears to be related to obtaining free in-game currency or items, a common social engineering tactic.

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-get-free-robux-in-2021-game-hack In PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/client-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/roblox-jailbreak-download-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/get-free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/roblox-big-paintball-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-items-on-alo-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/hack-roblox-account-com-3_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/claim-robux_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_off000030bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BD 22208 bytes
SHA-256: b54a4cc1e34d2206142a9d3418be44460b64f15ce491fc1262980dd93ce701ff
font_01_sfnt_off00006210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 19384 bytes
SHA-256: beda04841b54e06a4d18d1cbf02b1b14a72e3f9ac36d377307adf26878c6faf9

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