Malicious PDF — malware analysis report

Static analysis result for SHA-256 a226f0f0969160be…

MALICIOUS

PDF

36.5 KB Created: 2021-06-27 16:40:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 498c906ab87e9b5d76cb758d5ef95517 SHA-1: e192f52ce75969504d6fb701fbbcb60f70a18235 SHA-256: a226f0f0969160be7da1794fcdd59d7b7f069acc10cee786cbf2803afe667a17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure is a link to 'como-instalar-hacks-para-roblox-jailbreak-2021-game-hack', which is hosted on netcdn.co. This pattern suggests the document is designed to trick users into visiting potentially harmful sites, likely to download further malware or engage in phishing. No scripts were extracted, but the embedded URLs and the nature of the lures strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/como-instalar-hacks-para-roblox-jailbreak-2021-game-hack In PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-minion-game-hacked_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-cards-generator-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hacks_GM406889139.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_002_off0000337c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337C 23080 bytes
SHA-256: 1c50d7f1588fe29c3a1139af739221406d016d628f058f9927e16ecd6bde54d0
font_01_sfnt_off00006783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 19864 bytes
SHA-256: 0077518e59c3f359f16c2ee2eba9c6df1c8669c8ac60332628a228f5f63823d8

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