Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2877444ac69fb4…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 03:09:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3785be191ba09d8f9f6fdab453ecb92c SHA-1: f81c794a887bbcd81376d21545764858f7b534ad SHA-256: 0f2877444ac69fb44b71ed3e61bb252463c73f6efc1cc5dcb60ab8eb9f7fb802
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to a malicious redirector. The document body, though partially garbled, suggests a lure for 'Free Robux' and 'game hacks', aligning with common phishing tactics. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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-robux-command-2021-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-gamepasses-on-roblox-2021-pastebim_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/html-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-2021-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/my-account-was-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-roblox-purchases_GM431946152.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_off0000327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327B 22152 bytes
SHA-256: f81fd617c94d120238f8517d0412189db8bfed3709cbebb23af4963fb66b6089
font_01_sfnt_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 19552 bytes
SHA-256: 71930395e129789924858f3a23ef07dacf167731141e379539eefb099d03855a

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