Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bad4f6c5f65ad5…

MALICIOUS

PDF

34.0 KB Created: 2021-07-21 01:59:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b106fff679e17e3db45bbed691c92691 SHA-1: b60bc654b25cb90ce977bc114ab8f15f2872285f SHA-256: a6bad4f6c5f65ad50efe1c3e789356e77ce9e20f49c66a21ddb79ca6745f6af1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly flagged this PDF as malicious. The document body and extracted URLs suggest a lure related to free in-game items or currency, a common phishing tactic. The presence of embedded URLs indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.tw/app/431946152/can-you-get-robux-for-free-game-hack In PDF document text
    • https://magistrinfo.ru/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://magistrinfo.ru/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://magistrinfo.ru/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://magistrinfo.ru/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://magistrinfo.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-robux-scam_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_002_off00002d77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D77 23240 bytes
SHA-256: 5d4733c78259b13d579c2a46e5775fc55816db7d6a01eb693678c81651df7f2c
font_01_sfnt_off00006173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 18692 bytes
SHA-256: d129a6c5f28005a350724ed0c9aa8b78a6943fda33f90aed415417b1287415d7

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