Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8efa02c9e6d6b4d…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 21:07:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14a768e9853dce84a061ccfa5e63d74b SHA-1: b8efa86834a89b879a79a748d0950f17ba3a9e8b SHA-256: b8efa02c9e6d6b4d070d660a045dc12d72e3f7faccc6874a24e741d14077ab99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'game hacks' and 'free spins' generators. The primary link, https://netcdn.xyz/app/406889139/daily-free-spins-coin-master-2021-game-hack, is flagged as malicious. The document body, though heavily obfuscated, contains similar URLs and text suggesting a lure for free in-game currency or items. No scripts were extracted, but the presence of multiple malicious links strongly indicates a phishing or scam attempt.

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 https://netcdn.xyz/app/406889139/daily-free-spins-coin-master-2021-game-hack In PDF document text
    • http://ago.gov.pg/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/10-robux_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://ago.gov.pg/images/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/minecraft-marketplace-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
stream_003_off0000479c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479C 29232 bytes
SHA-256: 77f32533aeb82c3f90f3407e6a8131bbf6788c109dbf547bcfc3ed9ba9cdb390
font_01_sfnt_off000084d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 18708 bytes
SHA-256: 76af36f54327e394f6a0995f5c1804c6d580e71cb7eebf938ec25838add40309

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