Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10a5f6aebed5bb1…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 02:28:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c9faee28368a9107d278ee38e813300f SHA-1: 8c1dcb2a81bab1153760a1f2a3d037f1e8023add SHA-256: d10a5f6aebed5bb1f98b303d61c2b1def2aaf98dda67f722771a03a548b1b51b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and malicious infrastructure, masquerading as game hacks and generators. The primary link, https://netcdn.tw/app/431946152/how-to-get-free-robux-and-bc-on-roblox-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a lure for users to download potentially harmful files, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/how-to-get-free-robux-and-bc-on-roblox-game-hack In PDF document text
    • http://msfs-eastafrica.com/images/free-spin-link_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/pink-dimond-robux-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/com-roblox_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-virus-free-download_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/cheat-roblox-retail-tycoon-116_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/cheat-argent-deathrun-roblox_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/master-coin-free-spin-daily_GM406889139.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_off00005038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5038 26188 bytes
SHA-256: b9f3b01831eb574f1bebce87dbc57a48c4f280188568570160b645f9c4ae554a
font_01_sfnt_off00008b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B25 18528 bytes
SHA-256: f231475319607bff67d186e22b0810eaf5f06667f1543e7b4a5020549f86ee4e

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