Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84dd0d799ef56b1…

MALICIOUS

PDF

43.5 KB Created: 2021-05-20 02:20:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 733aa2384d35b7380630e313cc209aa7 SHA-1: 004c167147fc07be0439d2450eb080fbc0761a47 SHA-256: f84dd0d799ef56b1a074e25a54ee755f4b499e07150c2e47132256102a85c149
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, disguised as "game hacks" or "generators" to entice users. The primary redirector leads to a page that likely serves further malicious content or exploits. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/835599320/what-is-tiktok-make-your-day-game-hack In PDF document text
    • http://bc97.de/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://bc97.de/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://bc97.de/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/tiktok-free-followers-hack_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000044fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44FC 23820 bytes
SHA-256: 7c94023d9477fe61e13599d1954d16377f8689dfe3075a8f431d3b19cb7ac6e9
font_01_sfnt_off00007ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB3 3244 bytes
SHA-256: a640b4435a3a1441add55931bf654883824307683325fda534d12538443e5429
font_02_sfnt_off000085d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D5 18732 bytes
SHA-256: da4eac38ca6f5e7c8d94d5b980ae0226d53f1453b868d046a33c15a6e661b569

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