Malicious PDF — malware analysis report

Static analysis result for SHA-256 c877a5c419bce4ab…

MALICIOUS

PDF

40.4 KB Created: 2021-05-23 03:39:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8fb2a36221a3981124d97ff707497a00 SHA-1: 6bc0d8469ec5affc5a98da18631f9df7921b691f SHA-256: c877a5c419bce4ab0c1c03ee8de072864e9eb58aa4517f9b487c7814c55bd4a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a call-to-action button, all directing users towards a lure for free Robux. The primary URL, https://netcdn.xyz/app/431946152/how-to-get-free-robux-on-mobile-game-hack, is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7718

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/how-to-get-free-robux-on-mobile-game-hack In PDF document text
    • http://emilac.com/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://emilac.com/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://emilac.com/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://emilac.com/images/pokemon-go-free-7km-eggs-july-2021_GM1094591345.pdfIn PDF document text
    • http://emilac.com/images/robux-free-c_GM431946152.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_off0000345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x345D 26936 bytes
SHA-256: 16a9d37229c778f300d8643cb014fef82bdb53679960b6d1591e10cb924b896c
font_01_sfnt_off000070dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DD 3112 bytes
SHA-256: 471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80
font_02_sfnt_off00007b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B96 18672 bytes
SHA-256: 54aa4755d3d4fcbd00d11f20b69d4376192dec0a97bdc1376cf216d73564a968

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