Malicious PDF — malware analysis report

Static analysis result for SHA-256 8197211a7e9116c1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 00:24:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5cfc8b095b41fb4b01c001fd52a422d3 SHA-1: 135621e9a5c5e0283098fdb0b5b4b8aa4cf5f17a SHA-256: 8197211a7e9116c12f32d7fedd9a1222e020bb2b552cb1f6aa447126cd0bc0bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically luring users with promises of game hacks and currency. The document body and heuristics confirm the presence of these deceptive links, which are designed to lead users to potentially harmful websites. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links within the PDF.

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/roblox-hacks-2021-game-hack In PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/free-roblox-mobile-app_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/roblox-robux-hack-no-human-verify_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/speed-hack-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/game-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/roblox-free-bandana_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/overhol-roblox-free-shop-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbatam.sch.id/__statics/gudangsoal/files/free-robux-no-money-needed_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_off00002f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F90 22172 bytes
SHA-256: 63d8c74a474e6b846c233edd8c0202037dd745088012c0625a58fe0b8b995ecb
font_01_sfnt_off000060df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DF 19056 bytes
SHA-256: a827687bde1c23907f75db23928d8c544c1849638492c2c48bf6e5fa6ea38882

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