Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bc61a979bc13df…

MALICIOUS

PDF

41.3 KB Created: 2021-05-13 08:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f04ab8133e767ca9dc3ec2f27a2cfaff SHA-1: 6c37b970dbe4d040c7882003f852413d1d1a5cbb SHA-256: a9bc61a979bc13df0ea9c274f9861a2be8075ec0aeb2952ca4c3edd702131c23
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it uses a redirector link to lure users. Although no scripts were extracted, the document body and heuristics point to a phishing or scam attempt designed to drive traffic to potentially harmful sites.

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/406889139/8bp-hack-coin-master-game-hack In PDF document text
    • https://academy.cr/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/moon-active-games_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/get-robux-com_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/mathep_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/apps-for-free-robux_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_off00004687.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4687 24856 bytes
SHA-256: 1da5c154449b5785716402e86d356c0f9a530fd712224697346d4cd31922ebe7
font_01_sfnt_off00007f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 18260 bytes
SHA-256: 40ee1887dd31b0862b85694c1b9e7d14e4b08e6d7c2645c8853cb2866e35e1e1

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