Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2915bf07c540b19…

MALICIOUS

PDF

35.3 KB Created: 2021-07-19 06:21:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2fdfdeb55c31bdf0d6eef6305a84a651 SHA-1: 59719be5f536fbee0c03ae4cef0ae7fb2933e9ac SHA-256: d2915bf07c540b190ea58650ba8ea08165611a40ef7658d07bedb6aee508bb84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to 'free Robux' and 'game hacks' to entice users to click on embedded links. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-on-computer-game-hack In PDF document text
    • http://grugliascogiovani.org/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-hack-peoples-roblox-accounts_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
stream_002_off000031be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BE 23276 bytes
SHA-256: 6df70f46606c385129c0ed525028387d4eb82706df8a598f22b337eb23ee7de6
font_01_sfnt_off00006656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 18904 bytes
SHA-256: 45ab1b38094dcf93b5bcb7e9add098b6c863ed9ada52ace8b55ee9180603d92b

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