Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcce25c859303a94…

MALICIOUS

PDF

42.4 KB Created: 2021-05-19 14:42:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 098e0407bb39008728b8d9b8f02613c6 SHA-1: 1f63655ebccc1e041fd71e2152a4736cc9cf1d3b SHA-256: dcce25c859303a94e2b4ae92cb82e4326af56e3fbad9c34e27dd96444cdfacb8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising game hacks and generators. The primary lure appears to be related to 'Pokemon Go Free Yanma', directing users to a URL hosted on netcdn.xyz. The presence of numerous similar links on isovca.com further supports a phishing or scam campaign.

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/1094591345/pokemon-go-free-yanma-game-hack In PDF document text
    • http://www.isovca.com/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D5 26876 bytes
SHA-256: 2c44ff29313e688deea72ecf870cf104988b6ea6d713b6f6d2765150ff4d2a08
font_01_sfnt_off000083d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D1 18232 bytes
SHA-256: 2cd4f80d95b26f4b4aa176126f4c1ae0b44844a97eeb47fe25bed5f578421fa2

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