Malicious PDF — malware analysis report

Static analysis result for SHA-256 0245899e20d85011…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 11:34:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 78025f6d20e3f0a109c30efe8f1af751 SHA-1: 7b54793682a230f1c5884055bbb19c7b8b671e0e SHA-256: 0245899e20d85011a6369959a2e0de3d94cbc2c4f0d2ba19e9f4e08c161680b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirect URL is https://netcdn.xyz/app/406889139/coin-master-heaven-links-free-spins-game-hack. While no scripts were extracted, the embedded URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic indicate a clear intent to lead the user to potentially harmful content, likely for credential harvesting or further malware delivery.

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/coin-master-heaven-links-free-spins-game-hack In PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/robux-online_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/haktuts-coin-master-free-spins-2021_GM406889139.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_off00004b98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B98 25760 bytes
SHA-256: fe1b8f5065211d55b2e27c0912c92f9eda7250d195adbf69ff17dee09a918947
font_01_sfnt_off0000856c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 18168 bytes
SHA-256: 027d16a1c60dbd0eb1df4048bc3da2018b11e953b841f7f45fc354c272db0dc4

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