Malicious PDF — malware analysis report

Static analysis result for SHA-256 42132ba1e754432c…

MALICIOUS

PDF

44.3 KB Created: 2021-05-13 06:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fa764d78475bc7ccbf746aa5cedeac74 SHA-1: 1eeebb5e78618bc003f25ca15c6bb250b59f6a0e SHA-256: 42132ba1e754432c489af249b72dedcb2cdb918b6f558ecf62a87780039c2919
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • 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 https://netcdn.xyz/app/431946152/robux-robux-game-hack PDF link annotation
    • http://avocatultau.eu/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://avocatultau.eu/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://avocatultau.eu/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://avocatultau.eu/images/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://avocatultau.eu/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://avocatultau.eu/images/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://avocatultau.eu/images/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://avocatultau.eu/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://avocatultau.eu/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://avocatultau.eu/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A7 24472 bytes
SHA-256: 2ea7c0f5a109391aefb29937de406f696ed7752822dcf91fcdafa9c4295554a5
font_01_sfnt_off00007eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFF 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 17852 bytes
SHA-256: fa3705be5ee6565d64fcba6f9827690fa2c8bb031b8e73c4196ce8f5ba2d7c1a

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