Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fefe6b15fbe58e…

MALICIOUS

PDF

47.3 KB Created: 2021-05-21 09:29:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26819f30f80c18aa35a38698e08b8a99 SHA-1: fad94bb648bac3f351521650fc43aee9974c363d SHA-256: 23fefe6b15fbe58e8787e7f52923615bea510ddc9e22fc09f2e6e90b84a11976
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple links to malicious redirectors and other PDFs hosted on solidcom.ch, indicating a chain of malicious content delivery. The presence of embedded URLs and the ML classifier's flagging strongly suggest malicious intent, likely to lead users to exploit kits or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7358

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-games-that-actually-work-game-hack In PDF document text
    • http://solidcom.ch/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://solidcom.ch/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://solidcom.ch/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://solidcom.ch/images/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://solidcom.ch/images/free-robux-by-watching-ads_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
stream_002_off00003676.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3676 35012 bytes
SHA-256: 35169d55155b5d7fa2f1f469c19501f961f4f20bc7b6509afddce7283ef4e7d7
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 7336 bytes
SHA-256: ff031f4d9839d8bb59c904b93876e4f58da413e9417a9fc59db7fc3d052023ea
font_02_sfnt_off000094c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C7 19392 bytes
SHA-256: 2bd118a57b53ff37cab680797aee460eb59fed046ceba4ed0277135d7eae5baa

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