Malicious PDF — malware analysis report

Static analysis result for SHA-256 42dfc9f86d5b4988…

MALICIOUS

PDF

40.3 KB Created: 2021-05-10 17:11:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eedff2b00c16fbdcacc87fc4e6f2c5b9 SHA-1: 4c675ed21badf8f243432a1613132695f43cf761 SHA-256: 42dfc9f86d5b4988de8b7fb72035bcac43bab1a966aaf8e9f2caf37f6277bf3d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links and visual cues designed to trick the user into clicking a link for a game hack. The primary link, 'https://netcdn.xyz/app/431946152/roblox-source-game-hack', is a known malicious URL. The document's structure and content suggest it is a lure for a phishing or malware distribution campaign, likely leveraging a PDF exploit to execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/roblox-source-game-hack PDF link annotation
    • http://algierimasonry.com/images/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-just-enter-username-and-password_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_003_off00004135.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4135 25616 bytes
SHA-256: 90ad45420b579b5317babfd5f322dc1616588d374b56af5e1ba8646b8608ce90
font_01_sfnt_off00007c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C86 17924 bytes
SHA-256: de701b1390df5ea6859c32be6292d3183886ea3a2a613b5f80b12093d50b4b47

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