Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d98fca741705dc…

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 15:09:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 44c2ded60503cf52c258152ef8a94851 SHA-1: 0832e84655c2bafb7f918053a07f3d905758004e SHA-256: a1d98fca741705dcae5e3daeb3d882257c4cce6059e743b0dcb96a5529efcf98
160 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirectors and potentially malicious PDF files, disguised as game hacks and free item generators. The primary redirector URL is https://netcdn.xyz/app/406889139/free-spin-link-in-coin-master-game-game-hack. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-spin-link-in-coin-master-game-game-hack In PDF document text
    • http://battistibrothers.com/system/userfiles/files/real-robux_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/10-robux_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-fun-robux_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_off00004ddb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DDB 25428 bytes
SHA-256: 63e06fcf0ea03d7b00133d2f2f90b6a6d96ef4313703f97fd09705142f015683
font_01_sfnt_off0000870f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870F 18316 bytes
SHA-256: 83e319b57b25df8003591b2f8cd8f74939fd682d39c72f42c8d3fdd92a1d2569

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