Malicious PDF — malware analysis report

Static analysis result for SHA-256 0872bff28857f937…

MALICIOUS

PDF

46.7 KB Created: 2021-06-11 01:37:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47ce970e93dc77b9da232f6aad225183 SHA-1: 7da5b2991aed43902158368d0d5104476bfc1833 SHA-256: 0872bff28857f937d7341793c1c5b4c04dcc23c8da2f02080c4a017c14c4af52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as generators for popular games like Roblox and Coin Master. These redirectors likely serve as a distribution point for further malicious content, such as other PDFs or executables. The presence of game-related lures and malicious redirector links strongly suggests a phishing or scam campaign aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/cerberus-hack-roblox-game-hack In PDF document text
    • http://kermas.eu/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fc2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC2 24220 bytes
SHA-256: 855b15fee4359a88ac2ed2263383271702e165d5c6edf6d8dd4a58c473819155
font_01_sfnt_off000086b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B7 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000935f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935F 18320 bytes
SHA-256: 4a7432113e715638dfb08ba9d30eefa5526d7a02fbe81c924495bcbf51143630

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