Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b7f3bcfa86591b…

MALICIOUS

PDF

42.4 KB Created: 2021-05-19 11:06:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d9ba6621c4e6390544cb27f1bf474935 SHA-1: 6a451e64023d5106c9ed94d691042b6b26e5c8df SHA-256: d9b7f3bcfa86591b62013a52860be58eab919a0f43b37d51ff4ac7c29f8c83a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary redirector URL is https://netcdn.xyz/app/406889139/game-hack-coin-master-game-hack. The document's structure and embedded links strongly suggest a phishing or social engineering attack aimed at tricking users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/game-hack-coin-master-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-come_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/real-roblox_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_off00004a8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8E 25564 bytes
SHA-256: 98889f042a7b9975800068f9376a70799b3a7b11c2b3178e0cbc244f4cc7607a
font_01_sfnt_off00008456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8456 17976 bytes
SHA-256: 6c4bc6518c449e74acc10e239ebc2a40e5371f7bb57007301009253b23203593

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