Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3183b1f17b1fa2…

MALICIOUS

PDF

32.8 KB Created: 2021-06-19 21:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3dca1622713d37ca0852cd01a1245ad5 SHA-1: e74cb3b9701805954e859414ab582cb8fbe49a3c SHA-256: bc3183b1f17b1fa2043ed49c7e821a794930218e41f36342b5dfb8c7ea199919
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links designed to lure users into clicking on them by promising free game currency or hacks. The primary link, http://netcdn.co/app/431946152/cch-ly-robux-free-minhmama-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce the theme of exploiting popular games for in-game currency. No scripts were extracted, but the presence of malicious redirector links and the lure theme strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/cch-ly-robux-free-minhmama-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-helmets-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-apk-mod-hack-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/cheat-codes-for-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-admin-on-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.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_off000029dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29DC 21852 bytes
SHA-256: 374a30a09971db53b113223ec6eb792401390409dd4daa00dc28d187dd89710a
font_01_sfnt_off000059fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59FA 19636 bytes
SHA-256: eecfdba23b53dc2d3fdae5bd0c8d425fcfa8e748ee29b1f9b5563ad5af769e7a

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