Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5162eca13ba9694…

MALICIOUS

PDF

36.7 KB Created: 2021-07-05 16:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 12f4c95f42ca7452e7bbcd4c4d78a3bf SHA-1: df031b8c216866258c72cbdad1ac67c791dba02a SHA-256: a5162eca13ba9694ee8446a7ef18d3a965996fe7ce58c116d5866b334b19acf9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks and free resources. The heuristic firings indicate that the PDF links to a known malicious redirector and is designed as a lure for game-related cheats. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/coin-master-free-snacks-link-game-hack In PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/kazok-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/can-u-get-free-robux_GM431946152.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
font_00_sfnt_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 22756 bytes
SHA-256: 8c1024cda870ff8e58457b9c4eb2a2d4cc162d845cefc7a7e36d2a9d3d0fb39e
font_01_sfnt_off000062e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E6 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCB 18168 bytes
SHA-256: 49b3383b0ff20e2977df0bc058e05ba6d34df220f914051dd6e6d9430a583dba

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