Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7622750a1769fb…

MALICIOUS

PDF

45.5 KB Created: 2021-06-08 21:43:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e5e4fa040e7209342db923d4307f24ad SHA-1: 3c37af819d6d95385c70f60c34381e0c769852a6 SHA-256: df7622750a1769fba012cdc18e2226e39c24e2c9800383d5432a00aa6debfb72
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and text that lure users with promises of free game currency or hacks, specifically mentioning 'Robux' and 'Coin Master'. One of the primary links redirects to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 3

  • 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 https://netcdn.tw/app/431946152/cardcode.pw-free-robux-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-followers-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/without-pokemon-go-free-evolve-after-trade_GM1094591345.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-download_GM406889139.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_off00005247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5247 24548 bytes
SHA-256: cab6a3f7c670f15e1c5c21b135d0a17be30c33f695a35b97cdd193e14248e9d8
font_01_sfnt_off00008a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3B 20036 bytes
SHA-256: f4cd416921926b9e4f9f7bdbe005b9f7a7a9b3ab71eadce61b9fe811a7dbf1fb

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