Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09f02cf9dd26fd4…

MALICIOUS

PDF

32.0 KB Created: 2021-07-21 15:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afd005fec0f68d5eca1289783abc27cc SHA-1: cc0326609ecd119d29e62f007291e96e1170978b SHA-256: d09f02cf9dd26fd4badd1febfbc28f1f4d1d5d6b46bc1675d993c77af292ee71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/479516143/is-minecraft-java-edition-free-game-hack. This redirector is likely used to deliver a second-stage payload or lead the user to a phishing site. The document's content and embedded links suggest a lure for free game hacks or generators, a common tactic for distributing malware or conducting scams. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/479516143/is-minecraft-java-edition-free-game-hack In PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/robux-hack_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-ipad_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
font_00_sfnt_off00002a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A63 22156 bytes
SHA-256: 8aa5db5d5c808f2cfe9e200da13d6cc46446f2b9f562f949e92729bc5b583826
font_01_sfnt_off00005b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B75 18164 bytes
SHA-256: 781be49a7702cf06049b723b9768b43598e981f21f4500b8f56603e8064b4811