Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4598458302a9e7…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 00:34:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 84d73e028275e9aa1fb6cd54711bf8e2 SHA-1: acaf8fbfb96a49b58cecc9244e7de9158bf36b45 SHA-256: 3f4598458302a9e79c6357ad478dabb05164115b78529029c6b140e9e611561f
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and cheats. The heuristic firings confirm the presence of malicious redirector links and a lure for game-related exploits. The document body, though partially garbled, also contains references to these lures and URLs.

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-apk-hack-3527-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-yugioh-gx-world-cheats_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/pin-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/best-roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-buy-anything-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/electric-state-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-pain-exist_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off000032ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AC 23256 bytes
SHA-256: 0f8abe1270e6a7a0ad3e3a34a4641c55843cfa35c6b9d483e5fff086ad0267de
font_01_sfnt_off00006706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 18668 bytes
SHA-256: e518b1ee408f5ff5a135765797f4c8ad642ecc3fcfaab0f41e1159d26b41fd5f

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