Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fadbac8226ca5b0…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 11:56:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9139a7bd6055783a043886a4bcd56534 SHA-1: 166fa3c466fe9aeabe6eb735b7693336cabde02d SHA-256: 2fadbac8226ca5b0bfa05f86efb1d86ea26e1043d3986851b0767d18c42f0c7d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-hack-tool-v1-9-game-hack, which is identified as a malicious redirector. The document body and embedded links reinforce this lure, aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-tool-v1-9-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-inject-proxo-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/inside-the-world-of-roblox-pdf-free-download_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-hacker-come_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-redeem_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/unendlich-robux-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-rbx-bc-claims-anb_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-generator-no-fake_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-a-account-roblox-v3rm_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_002_off000031a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A5 22980 bytes
SHA-256: 9e79843a1a1def815435df3631e30135f0698b6ff4ed9e2548b739611299f0b4
font_01_sfnt_off000064e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 18480 bytes
SHA-256: ea33471c80a3bd31428d461718b690a97c81e9fb151dfe42084b6f28d2d30dda

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