Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca964af3883a02e…

MALICIOUS

PDF

45.3 KB Created: 2021-05-17 05:11:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8da675e5f7a4345e0a594e934b9d6364 SHA-1: 1492cf3d8ec180d0ba9dce3b400d3e86bff0d634 SHA-256: 7ca964af3883a02e2a26dd9bef02a3f75f990e5e8a06e7ba9a40f5328da4bd0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to a known malicious infrastructure associated with 'free Robux' scams. The document body, though partially corrupted, contains references to 'free Robux' and a URL matching the malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for credential harvesting or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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 https://netcdn.xyz/app/431946152/free-robux-not-fake-game-hack In PDF document text
    • http://www.reikiusui.it/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F9 24944 bytes
SHA-256: ca56cab5286f2a4491e7425a00cb85b0737b9549545099a64c3566112d6e5ee4
font_01_sfnt_off00008396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8396 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA6 18516 bytes
SHA-256: ca79d80576681ece98af22104654f282f19bfdcccdd95bbb76316d29f9029162

Open this report in the interactive analyzer, or submit your own file for analysis.