Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b8cf0b93a326cb…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 09:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bead7688842830b6fb8b582612686470 SHA-1: 5f75923e35e165e5d8949e9f47108b3a5bdb0051 SHA-256: f6b8cf0b93a326cb1666e3e862ace06f64eb5e6b522c7510e271dd89a4073b49
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting "game hacks" for Coin Master and Roblox. The primary lure URL is https://netcdn.xyz/app/406889139/como-hackear-coin-master-game-hack, which is identified as a malicious redirector. The document body, though partially corrupted, contains text related to "Como Hackear Coin Master" and includes several other PDF URLs hosted on alexandergroep.nl, likely serving as further lures or part of the redirection chain.

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/como-hackear-coin-master-game-hack In PDF document text
    • http://alexandergroep.nl/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/roblox-earn_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_off00004911.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4911 25732 bytes
SHA-256: 1c605d421bb7de3a5459b49cf34b0e6c5a94d6feca71c5a2ab91ec62fe811d27
font_01_sfnt_off00008533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8533 17976 bytes
SHA-256: 40dd236b971f40dc9e773aba28db4bcf9d666fe41fb73238afdc269e45a8876b

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