Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f5a0e854667ba5…

MALICIOUS

PDF

44.0 KB Created: 2021-05-13 17:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c73abad802195da3eef82d69982a36af SHA-1: 745fb5b7267988810303bea987a6213d65beb967 SHA-256: 55f5a0e854667ba52832b7253711c0a5620c90baaaaea51427315509c0dabecb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free spins' for popular games. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-free-spins-cheat-game-hack, which is associated with a high ML classifier score and specific PDF redirection heuristics. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-free-spins-cheat-game-hack In PDF document text
    • http://ivpr.net/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://ivpr.net/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/free-spins-coin-master-twitter_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000472b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472B 26116 bytes
SHA-256: cb2c591949fae69036d72810c858c6ee1417e8dfd8a3bdc6fb927915229ef659
font_01_sfnt_off0000804e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000089ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FF 18052 bytes
SHA-256: 9bd717b0e04310867829ca511b483eebbd60050a5b8b31305794fbcb17f8519e

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