Malicious PDF — malware analysis report

Static analysis result for SHA-256 739de5f6031a153a…

MALICIOUS

PDF

47.8 KB Created: 2021-05-15 02:34:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6f2f576fa0b8b6961ea5e2e2f8afc400 SHA-1: d496d15d386b2dab7fd0f504cc0b8d8e64f1211d SHA-256: 739de5f6031a153a85134f71617bb3f0565bbc39d5eb613e38b990f9dc896e64
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and free spins, a common lure for phishing or malware distribution. The ML classifier also flagged the document as malicious. The presence of these lures and the high ML score indicate a high likelihood of malicious intent, likely to trick users into downloading further payloads or visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/coin-master-daily-free-spins-link-2021-today-game-hack PDF link annotation
    • https://7gking.tw/upload/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/robux-gainer_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_off00004acc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACC 29808 bytes
SHA-256: a3a8bbdc618302ba23f64b8f6f96291518ae0b6a07652a70cf2bb69bcd4528e8
font_01_sfnt_off00008c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000095db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 19052 bytes
SHA-256: eaae1ca97f535f7f19a3027bb05b0c0b9ff144311ff5366650acbeeb70d65258

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