Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc55931ed3d885e1…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 10:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bbaec073ed145f75f0610a840e92bdd2 SHA-1: 15f3db23e485f3ccff132396a28da0f416829277 SHA-256: cc55931ed3d885e1acbb7445cb7fb85b540003cb6c0126edba5ab856097b852c
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and generators, directing users to the URL http://netcdn.tw/app/479516143/will-minecraft-dungeons-be-free-game-hack. This URL likely leads to a malicious payload or a further phishing attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/will-minecraft-dungeons-be-free-game-hack PDF link annotation
    • https://www.astrospace.com.tw/upload/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-amera-hack_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-can-i-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/robux-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-hack-someone-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-get-robux-for-free-2021-without-builders-club_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-paintball-level-hack-cheat-engine_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_off00003083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3083 22148 bytes
SHA-256: 2d6ee4a2ffbfbbc2f71acfaadf1032626348da943f7fd52928ce3336a1ce5d5f
font_01_sfnt_off00006094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 18796 bytes
SHA-256: a3e2eca43bdc685dc91cfde71aa7da7e93eda67de1cffc55b2ecd2ffb91a605f