Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d40987c702abce8…

MALICIOUS

PDF

45.1 KB Created: 2021-05-13 15:03:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b68ac07ebcb266509ae3808c90a78fc4 SHA-1: 03cb50173e33a79cc19db56d663178f47e5ad8b3 SHA-256: 7d40987c702abce8d6621028024a155b17fba33f89829b3565d08f3854f23c50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free currency, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. The document body text and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/free-spins-coin-master-2021-game-hack In PDF document text
    • http://vibrato.fr/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ccc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCC 24156 bytes
SHA-256: 83ef3713dec667ba716067c3143c023826e5287c6217807e2f15c122cbd5aacc
font_01_sfnt_off000083d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D9 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8A 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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