Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18112dc9eca0f73…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 06:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c16da77332c5fdcfbc957b998b224229 SHA-1: 57fa7cc4e09a2622ca014f435150120122001262 SHA-256: c18112dc9eca0f73cfb30e38d69be88d4fa320aceb8864df2a881b3658d6d333
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to a "game hack" lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a potentially malicious website for phishing or scam purposes. The presence of a "download button" heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/master-coin-master-free-spin-game-hack In PDF document text
    • http://lesvossolidarity.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://lesvossolidarity.org/images/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lesvossolidarity.org/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/cm-spins_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/rbx-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD0 25856 bytes
SHA-256: 793f3e467f8907b64df6f385b98d0b398cbacaecfab0b26f0de7147a661fbe93
font_01_sfnt_off0000868c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00009077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9077 17884 bytes
SHA-256: 2eace5707960ab6674c345fc5925bb74d79b72c9d0e947ec779627780b9711cb

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