Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca2bf5f235b1247…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 21:59:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7f360e59fd4331dd721af1984e6505c5 SHA-1: d22f76cb9b7f56da0b42044671a5eefcdff8bf88 SHA-256: aca2bf5f235b12470f21cb144e2c041118ff99ac2c79b378bebf51b564960ff0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and cheats to entice users. It contains multiple links to known malicious redirectors and further PDF files hosted on potentially compromised domains. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-cheat-engine-hack-game-hack, which is part of a chain leading to further malicious content.

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/406889139/coin-master-cheat-engine-hack-game-hack In PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-game-hack-scripts_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-inspect-element-codes_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-roblox-bot-account-dump_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/haw-to-get-free-robux-2021-march_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/i-just-got-free-robux-from-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/rxgate-cf-free-robux-redeem-code_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/inject-hackcom-roblox-website_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/wurst-minecraft_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_002_off00003074.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3074 23256 bytes
SHA-256: 313a4104b6c54d661b9c24c9fbe5ff29d0dd674ce4fa5ef3496ab1e199eb6e41
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 18172 bytes
SHA-256: e82ee3268dc79715fc84a0eba251e7e7fc7201a2349113e20b99f525f553e565

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