Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12a22d93095dbc4…

MALICIOUS

PDF

39.5 KB Created: 2021-05-22 23:37:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 46579d26d8c4cec8b8c66baed3701e80 SHA-1: 82be1e4a69397489b5fd1b4bcce51aeb64ee64ec SHA-256: d12a22d93095dbc41c1d1881819b75d53b8627d875e00b3191e5cd8c6dce876f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body explicitly mentions 'Free Ways To Get Robux' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', indicating a social engineering lure. The presence of embedded URLs and the ML classifier's high confidence score support the assessment of malicious intent, likely to lead users to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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-ways-to-get-robux-game-hack In PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/pubg-uc-yatrma-sitesi_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000346d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346D 29504 bytes
SHA-256: c2e052bcf5ed2dc165937649464c478fab98db4994081d7b676dc3595ec52bea
font_01_sfnt_off000077ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 18724 bytes
SHA-256: 4748f019d46a9554f00c7c8cf9bb59ec204dfb95bc520e2d25b5a7c8ef81b270

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