Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6bbcd3b00286425…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 15:28:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c2e6dbc7943cd1d0a0c95024a64e108e SHA-1: 2d3485894e062b8467f512b9c00af075f8d287d1 SHA-256: d6bbcd3b002864251f1b14c957a5dd99633bb611882b53809b7615610b18d04f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector lure, specifically advertising a 'free generator / game hack'. The primary URL, http://netcdn.tw/app/431946152/give-me-robux-now-game-hack, is identified as malicious infrastructure. The document body reinforces this by displaying the same lure and URL, indicating a social engineering attempt to drive users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/give-me-robux-now-game-hack In PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/prison-breaker-hack-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/all-anthro-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-mod-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-mining-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/fun-free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-generator-no-human-verification-2021_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_off00002df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF2 22468 bytes
SHA-256: bd272ae48a95e4adfe92d70bb5d58d38dbe3d7af02c5dac799abe8373e6f9e54
font_01_sfnt_off00005ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 19144 bytes
SHA-256: 4e2a3ce40f10caa3e5ad6ab7b54716fa6c0edc928f953ee2f302d526ca99eef3

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