Malicious PDF — malware analysis report

Static analysis result for SHA-256 a389ba9ac3d10614…

MALICIOUS

PDF

33.9 KB Created: 2021-06-29 23:43:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e7e4fdcb5ed96bf34a4da9ef8c9d637e SHA-1: b7c53273f7f13e934559293d81ba8b08476e17c5 SHA-256: a389ba9ac3d10614448cff1417d8bc1bedc80ed0e02c4b84fd204b5a8ec60941
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links that lead to a known malicious redirector infrastructure. The document body and embedded URLs suggest a lure related to free game items or hacks, aiming to trick users into clicking the malicious link. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/free-roblox-birthday-banner-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-gamepass-exploit_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/tons-of-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/www-free-robux-win_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-download-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-rblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-download-for-mac_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/https-pastebincom-incrible-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-installing-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/griffin-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/comment-hacker-quelquun-dans-roblox-qui-a-bocou-de-rebux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coinmaster-spins_GM406889139.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_off00002dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFF 21864 bytes
SHA-256: bb2e171c0c00fc70e2597b1efbbb5e632ff6f6146cbb29f62647d1913307d0d2
font_01_sfnt_off00005e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 19392 bytes
SHA-256: 44a92e1da856831a26ca25235a50f9f801488ef2fad2be522233657a940f94f2

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