Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaa4c08a85909fa…

MALICIOUS

PDF

54.2 KB Created: 2021-06-09 15:51:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b71796f6c4b19592d25598e7cc35e49 SHA-1: af39774fd3525db93ff7eca9577bd3c4d65e8e46 SHA-256: fbaa4c08a85909fad7b889dd8990d9f641284825e41cd33ea276b678527a72dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free generator / game hack' for Robux. The document body, though partially corrupted, contains references to this lure and the malicious URL. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9410

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/nicsterv-roblox-how-to-get-free-robux-game-hack In PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/collect-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-top_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/robux-sites_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000537e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537E 26028 bytes
SHA-256: 01ddc3db8c442f8e0fb3fbca2f6fe2e4bb774594d281bab9ba77585ddc510553
font_01_sfnt_off000090d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D2 4008 bytes
SHA-256: 515da38a799acdefd039af3a0dfb6ec4815b572058c9bd492ec5a77cd7658593
font_02_sfnt_off00009e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E59 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_03_sfnt_off0000b03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03C 18592 bytes
SHA-256: 4aff429fe1b119e7f098639142a0f00d6508a75b408738cae4d1ab1c5d696e00

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