Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efba300f5a5a89c…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 19:34:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 921e218a87ae3212fa38a1fe8ef71eea SHA-1: 1a25bd7e5d74b340e7f1f2a14f983a68ab0c7c05 SHA-256: 3efba300f5a5a89c081d3c65ebf2dfdd9422f974f94b562d980d0d8675ab0efd
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple external links, including one to 'robloxheroxyz-free-robux-game-hack', and is identified as a link farm. The document body, though partially corrupted, contains references to game hacks and free currency, indicating a lure for users. The presence of numerous PDF links suggests a tactic to manipulate search engine results or redirect users to potentially malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/robloxheroxyz-free-robux-game-hack PDF link annotation
    • http://pustaka1.unindra.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-snow-shoveling-simulator-free-santa-bag-ijf_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/test-all-free-roblox-gear-free-admin-ban-scripts_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-minecraft-java-account_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
font_00_sfnt_off00003221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3221 21904 bytes
SHA-256: 4345fd427962ac3be1163a06c14c35c9611c73f2b2a311085e2db74ee3608bc5
font_01_sfnt_off0000628a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628A 19220 bytes
SHA-256: 9a75403dc61fcebb8363624a6f582dcc4ac1fd2d4c1d167fae2ecfa95e24b96b

Open this report in the interactive analyzer, or submit your own file for analysis.