Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfe032afd8c686f…

MALICIOUS

PDF

49.9 KB Created: 2021-05-16 18:26:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6463a893130d67f027f5e0e909f7e111 SHA-1: 2a899538913a3545d06a86f23f0cdbc9623bd2ae SHA-256: acfe032afd8c686fd8f9188ddc50c398adbb4b7bfac4f5bcf5cafdcd8527103f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular mobile games. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting potentially harmful sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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-free-spins-link-may-2021-game-hack In PDF document text
    • http://shinarb.by/images/www-robux_GM431946152.pdfIn PDF document text
    • http://shinarb.by/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://shinarb.by/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://shinarb.by/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://shinarb.by/images/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://shinarb.by/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shinarb.by/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A08 30460 bytes
SHA-256: 229b74d8dcbfd518187a6fe70fd56fffadef2a777bbe221694c3db51b760be52
font_01_sfnt_off000087d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00009578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9578 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F67 18640 bytes
SHA-256: c2891075edf466e9ca18b75f026756f3cce0ae1a533514ba933d216c2a521642

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