Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af0eb896ea1b151…

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 15:55:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 79afc13ae2232253d1baab2fbf58665c SHA-1: 4e46f31df5276c34386fcf2fa097c46d1237466d SHA-256: 5af0eb896ea1b151fbe6f7f6a956e4ebc5837038f8dd8b2b665518c898b38fa5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux generator' which redirects to malicious infrastructure. The embedded URL http://netcdn.tw/app/431946152/how-to-get-free-robux-without-downloading-anything-game-hack is identified as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

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-without-downloading-anything-game-hack In PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-make-a-free-cam-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-roaming-camera-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-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
font_00_sfnt_off000033af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AF 22292 bytes
SHA-256: f1c271ca79a623694880776fb8212ae39458de6b864d6d2c9fcd49cf468c10b9
font_01_sfnt_off0000651d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651D 20064 bytes
SHA-256: b16c0b2685476b12d790c98b25c02402c4aa59cc1950d8e2b4913e5425ac04b7

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