Malicious PDF — malware analysis report

Static analysis result for SHA-256 965f886ce89b6552…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 10:46:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f51170c81cfdea776b590dceed78e0c SHA-1: 22db2c35ce9d0d7a6b0787e7b160732f379985f4 SHA-256: 965f886ce89b6552b2e0251989854ddad2ce44a3a8bd6d00ae7a592fdd2cf7d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free in-game currency. The document body and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting malicious websites. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-legit-no-survey-game-hack In PDF document text
    • http://casabea.de/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/pokemon-go-free-coins-promo-code_GM1094591345.pdfIn PDF document text
    • http://casabea.de/images/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/gratis-und-sicher-free-robux-gekommen_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://casabea.de/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/where-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://casabea.de/images/minecraft-education-free_GM479516143.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_004_off00005326.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5326 24560 bytes
SHA-256: d0e797d4613a69a398dd52957206321b4485d58b2886367fda18201099b78d77
font_01_sfnt_off00008c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0B 18820 bytes
SHA-256: b48524204736fe6e3e45def62798705a0769356dd56c20eb8542ca1eb232695b

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