Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25f987e9514c9d1…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 07:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2ec154fd4565aba36b9319bd1cc257fb SHA-1: 53aef16f28298dac9a7b6d8e70226aa8e9fb9bd9 SHA-256: b25f987e9514c9d1088dd92bf7c140182b75464d91a4555cf6a50aef89f46332
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at `https://netcdn.online/app/431946152/roblox-hack-2021-game-hack`. The document body and heuristics indicate a lure for game-related cheats or generators, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the presence of malicious links and the lure mechanism strongly suggest an intent to redirect users to potentially harmful content.

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.online/app/431946152/roblox-hack-2021-game-hack In PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/daily-coin-master-free-spins_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E90 25132 bytes
SHA-256: c90f33ad54fa579ff8bdc1f890270e6d9f39f8f5b5846009aae70baa27da1578
font_01_sfnt_off000087cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CB 18584 bytes
SHA-256: 2941163c9806e22b58ea5552aa71059231a9f2c3bbffbca0ecd460ca17501cff

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