Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a40aa92e97b923…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 18:21:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d42e669f823b79c359b7bd8e626a76b3 SHA-1: 4177340d4600dba85d1e34e1ce799ed96bbea7c1 SHA-256: 60a40aa92e97b9238c40afadb0bbf803f42a8f1a92a1a50051f1286e0bb87664
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-coins--spins-coin-master-game-hack. This pattern suggests the document is designed to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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/free-coins--spins-coin-master-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-bypass-the-roblox-cheat-engine-bypass_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-know-if-someone-is-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/a-pirates-tale-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-how-to-get-free-robux-on-android-amp_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-no-inspect-no-pastebin_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-how-to-make-your-character-look-cool-for-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-roblox-xbox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/im-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-admin-roblox-gamew_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
stream_002_off00002fd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FD9 22876 bytes
SHA-256: 7ccf69081ed982cc3d29537b009f8683d924b3cb710017dd96e486003ad7a9cf
font_01_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 18176 bytes
SHA-256: 246b8f63ccaeedbc6bff36fe6e73479c50587f584be52e68ff18fc4d6b5689c3