Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bb23933031fe06…

MALICIOUS

PDF

46.3 KB Created: 2021-05-17 06:44:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d857c565f7f622e33515cf4b4511532e SHA-1: 75991286383f24d390d02b53398e3487d9cc3295 SHA-256: 75bb23933031fe06e31c5a0cbf1c56a7c7ae67c14df94de0ebe5dd8a0c8ba9ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that are flagged as malicious redirectors, specifically promoting 'game hacks' and free currency generators. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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-apk-hack-2021-ios-game-hack In PDF document text
    • http://chartsmart.com.au/images/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/coin-game_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://chartsmart.com.au/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://chartsmart.com.au/images/free-robux-codes-2021-not-used_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_off00004dff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DFF 25228 bytes
SHA-256: dbdb9aba8038e56e53dfeb812255d7fc9095829c009c8e03c8138b1ecfcfc7c6
font_01_sfnt_off0000883f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000922a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922A 18296 bytes
SHA-256: 279b0b1c893eba727ec0845632f3a3712edc40ddf848fb82c48fddf2681f3228

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