Malicious PDF — malware analysis report

Static analysis result for SHA-256 720bd2a7bb252d6a…

MALICIOUS

PDF

40.5 KB Created: 2021-05-20 21:20:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d9989bd3fd25cafa65b0de3b16f7d517 SHA-1: 6aacf2481c75e7d75e9f5773d1a5338be48895c0 SHA-256: 720bd2a7bb252d6a6f5b7111bdbdbd9c42f552214358eca2214e9ae82232cb20
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded text promoting 'free gamepasses' and 'Robux', which are common lures for scams. The primary URL identified, https://netcdn.xyz/app/431946152/how-to-get-free-gamepasses-on-roblox-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7768

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-gamepasses-on-roblox-game-hack In PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/is-minecraft-free_GM479516143.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
stream_002_off00003564.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3564 25896 bytes
SHA-256: cf38e921a40d579d832f3b4bad01a8e577bfc88ebce850955cfc1bfd3a9d7ca8
font_01_sfnt_off000070e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E8 2936 bytes
SHA-256: a9826f95878172f1c6b60d314269d54f91078a17d6ed3b00bf98d06747741dda
font_02_sfnt_off00007b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B14 18880 bytes
SHA-256: fb511527e7af6e663a1f7c37f4b3a79e8b469c753c7cbc9de226132a948228f9