Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfd89006e782dea…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 21:50:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f1b3fc55b06a009ce5debd615e68950e SHA-1: 1cc98aba688e937e18f8787c2f532e95e7d72c37 SHA-256: 1cfd89006e782dea4057c244b70ed05d07782175222197bbdfb07c565da67347
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one critical heuristic identifying it as a lure for game hacks and redirects to known malicious infrastructure. The document body and embedded artifacts suggest a deceptive attempt to trick users into visiting potentially harmful websites, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/coinmaster-spin-ml-free-game-hack In PDF document text
    • http://hardbit.cn/images/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off0000483c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483C 25192 bytes
SHA-256: dc0862f0d50f5a65aef3dba96be5911fcb7a76808fcdef0265bd774f401cfdc1
font_01_sfnt_off00008121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8121 18220 bytes
SHA-256: 650e8f71a1b9292b8308c8990560b3515b162e3aa2d6bcbd8521e639c6c382b1

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