Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2779b8b9d67a7ef…

MALICIOUS

PDF

44.3 KB Created: 2021-05-13 04:05:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ccc48a5375792bfe736fa0d8fd060163 SHA-1: f6509b8aae78706dbb2ffa6d2f911c5050f41bf7 SHA-256: d2779b8b9d67a7efbff297e25e55081b0b9d24407077ab8e8e73f3a1222f1b7d
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 0.9980

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 https://netcdn.xyz/app/431946152/free-robux-rewards-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-clothes-and-hair_GM431946152.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_003_off00004d5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D5D 26500 bytes
SHA-256: c9501cbeb5a6c9ca09c7b1c240033ae742313a63d7339b7414eedd2ee0659895
font_01_sfnt_off00008a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A16 18580 bytes
SHA-256: f6e5d240c50f73aa936fa09c98082d3b637660329d811c3f0d463ac63f7ff7de

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