Malicious PDF — malware analysis report

Static analysis result for SHA-256 da82e33bed2b052e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-19 13:56:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 670500016855635a81c4577ee03edb14 SHA-1: c93079bbb59adbd1c506c47e7a7739e006a1ac90 SHA-256: da82e33bed2b052e845f67a0fbdd2242bf33039a6356faf054f567558fe7abba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency and hacks, directing users to a known malicious redirector. The embedded URL 'http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verification-2021-game-hack' is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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-verification-2021-game-hack In PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-minecraft-java-for-free_GM479516143.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_off00002e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3A 22552 bytes
SHA-256: e9fde7681fb86c7191a80aae2263be3404db96a02975f3cd54c44df2b46856b5
font_01_sfnt_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 19716 bytes
SHA-256: 31d772b234aed95a2750b730f7eac7c290b38569e1ee667b89ac2bbd89a0a9fc

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