Malicious PDF — malware analysis report

Static analysis result for SHA-256 d218f9c6895dd9ae…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 11:59:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: adb2311482c586a260e3cb6bdba8dd0e SHA-1: 13f7337ffb49bdcc81bbca16689567bf69715974 SHA-256: d218f9c6895dd9aec9abe64e1fb5f53f87b27079275e7be291250a41937e6dbc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/835599320/how-to-get-free-tiktok-fans-without-human-verification-game-hack, which is identified as a malicious redirector. The document body and numerous extracted URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

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/835599320/how-to-get-free-tiktok-fans-without-human-verification-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-para-teletransportarse-en-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-clothing-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/artmoney-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-robux-no-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacked-clients-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-survey-no-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-dead-winter-infinity-hack_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_off0000305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305C 22360 bytes
SHA-256: 7962ea8f5ff9c9b231c7988ad342de265b3adf07439188e4967913e77d646510
font_01_sfnt_off000061ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EC 19032 bytes
SHA-256: 59afca95f5720cf0e24e7d6ecb7bac51327fbe994847808ab98f6ba1bdee5ad4

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