Malicious PDF — malware analysis report

Static analysis result for SHA-256 e415fe5cf874610a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 12:21:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6f65b47ae71d021c099e14f7313d7101 SHA-1: 05b90a1f0c268ba0b092167cf31d7b729d4ce9e0 SHA-256: e415fe5cf874610a98b6dd37060005effb850aed799da70c69e8a26bf3a77d45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector, that promise game hacks and currency. The primary lure is 'Coin Master Hack Https Coinms Net' which redirects to http://netcdn.tw/app/406889139/coin-master-hack-https-coinms-net-game-hack. This suggests a social engineering attack aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lure indicate a phishing or scam attempt.

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/406889139/coin-master-hack-https-coinms-net-game-hack In PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-hack-nopde-engine-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-pc-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-do-u-turn-of-the-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/cool-free-roblox-characters-uu_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-in-inspect_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/flowify-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-promo-code-hack_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-and-tix-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-works-100_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/stella-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/hacks-bacon-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-and-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-free-epic-face_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-noclip-in-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-roblox-gift-card-redeem-codes_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
stream_002_off00002fe1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE1 22580 bytes
SHA-256: 0cb781753947ffb299890374fa4cb9fbc539609e0c70fcb54c7858b4c8d3e8fa
font_01_sfnt_off000061f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 18440 bytes
SHA-256: d4a0ce670d7ff27a0341fb2a5bc1c8134718dc63ae2ec70999bf7230e535e219

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