Malicious PDF — malware analysis report

Static analysis result for SHA-256 648320bdb03fa77b…

MALICIOUS

PDF

35.4 KB Created: 2021-06-27 01:51:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a42bdd5b85cc21240e28062dfa35ef4e SHA-1: ae941d707fff4ddba893d5075f88dfdda35644ec SHA-256: 648320bdb03fa77b4292cc5b145a3d017b1332063a0ca4f74db0e3ab4f0db436
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game hacks and robux. The document body and extracted URLs strongly suggest a phishing or scam campaign aimed at tricking users into visiting malicious sites. No scripts were extracted, but the presence of malicious redirectors indicates a high likelihood of further malicious activity.

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.co/app/431946152/roblox-what-day-is-restarunt-tycoon-2-coming-for-free-game-hack In PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/game-explorer-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/i-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-hack-tool-download-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-hack-dot-top_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/fake-gps-for-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-no-survey-or-deals_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/funny-free-roblox-t-shirt_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-code-generator-2021-no-verification-or-survey_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_off00002f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F92 22612 bytes
SHA-256: f5ea0d771fe4a8fea302e0c293e081d9734be7074877f1a83190100c8c16e0d7
font_01_sfnt_off0000623d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623D 20108 bytes
SHA-256: 75ec65ac9abd7d672742fd3f9b9c40ec41cca4869ba59f186e4159f45fbb7a0b

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