Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a7e5cb6c4351e9…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 08:06:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b697a5c657f691bea86c456e8f954e63 SHA-1: 020bf8473c0fd71a724b359e0674c745b2ba426c SHA-256: 51a7e5cb6c4351e9c8eb419d73013e6347301315f9c7079f0fba868e733fcc76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual call-to-action button, suggesting a phishing or social engineering attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs points to a likely download or redirection attempt. No scripts were extracted from this sample, but the overall structure and embedded links indicate a lure for potentially unwanted content.

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/spin-free-coin-master-game-hack In PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-minecraft-alts_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_off00004a18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A18 25728 bytes
SHA-256: d1a7c767a86daff4b54c4fb270d735bc38122a7f58acff3e89787883f6d4a364
font_01_sfnt_off00008387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8387 17884 bytes
SHA-256: 62d9ea50f60e8bb2d525932cb0bed6ec72f3825d2169fb999e19ba134a7219cc

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