Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d053748f698391…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 08:52:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 132fcd4c8d768d0f9d80e22ebd6610b0 SHA-1: 52bbcebf30235fe55bc9524a1d7ebf8eabf56082 SHA-256: a4d053748f6983918298c428a8f144a52409f0d95613fb6eb23e68710dd6590a
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 0.9865

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.online/app/406889139/coin-master-spin-and-coins-free-game-hack PDF link annotation
    • https://tnupacktour.com.tw/image/data/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/tiktok-free-like-followers_GM835599320.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robux-redeem_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/tiktok-free-advertising_GM835599320.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D6 25268 bytes
SHA-256: c94c4cc996df816e635e5788670a7d23f5a94a9b0aa5d4b0d1450b1901e9dc62
font_01_sfnt_off00008b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B25 18060 bytes
SHA-256: aba7dcfd42a0f74c9e892866c2c78c20b6cae4d7af540321f27c32cc6aee9396

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