Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b491136036c63f…

MALICIOUS

PDF

44.6 KB Created: 2021-05-19 02:05:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2bf09bf527acb9b8f847ed6f2cab1b47 SHA-1: d83920ad75f566676f3930985b8582b6d73b38dc SHA-256: 16b491136036c63f6d7c2884b3a09e850177d17bb49bd6ba48d9b52688258ecb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure content strongly suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/get-more-robux-game-hack In PDF document text
    • https://www.flexcable.com/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-spins-2021_GM406889139.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_off000046fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46FD 24364 bytes
SHA-256: cb16f3d9f54efcae82bfc6b2f368db4577ba62545d6768576239499c88ad558d
font_01_sfnt_off00007f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F26 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCE 18152 bytes
SHA-256: 3f0afb5031a6524980f5b4f14d61315d560e84a079a8a334c40e6e2be07f7597

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