Malicious PDF — malware analysis report

Static analysis result for SHA-256 254b5f12fff3deb3…

MALICIOUS

PDF

33.3 KB Created: 2021-07-03 11:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1605e0011b241a287d066ed19695043d SHA-1: 0913721b9159788b65dde4677e1aec588ffae25e SHA-256: 254b5f12fff3deb30cb926cd8b52173d6f003f8566f9bed463ea9faaac45b05c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators for popular games like Roblox and Minecraft. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous redirector links indicates a phishing or scam attempt. No scripts were extracted, but the document body and heuristics point to a lure for users seeking cheats or in-game advantages.

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.tw/app/431946152/roblox-hacking-website-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/rcm-roblox-hack_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-make-cheat-engine-undetectable-to-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roam-camera-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-robux_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_off00002c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C64 21940 bytes
SHA-256: 38213163557d1cbdd54d8dcab4f6015134bcbcc23fa2b5e88e56cdf8882bd0e4
font_01_sfnt_off00005cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 19076 bytes
SHA-256: 62b0d36ce948ffdc11f28ab91e3b337edea8e9919308700d4ef5645592577123

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