Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d853a42eac474a…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 22:40:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 936b36c6d9c0fe931b7423468d7c07fa SHA-1: 066f9365e52bfd4a1a28505b443289811f420c28 SHA-256: 16d853a42eac474abb323238b283c20a2a28a1e91d192c13cacec2aac724fd2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as free game hacks and generators. The embedded URLs likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

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/479516143/minecraft-story-mode-free-game-hack In PDF document text
    • http://sttlets.education/senayan//repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-by-watching-ads_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_off00004d29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D29 24692 bytes
SHA-256: 13be877ff109e2d99637e70c9781ee4df983d0eefe602a723483baceea99186c
font_01_sfnt_off00008563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8563 18064 bytes
SHA-256: 5e5fb910f64b2149404149cb3256d61ed755ed43a7017f23b86fa73a2f1502c2

Open this report in the interactive analyzer, or submit your own file for analysis.