Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bc29de75f45ac7…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 08:00:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b264b7adf9068d0e40cd6d01a90f55d1 SHA-1: 8d823002d7709d027cc7e26fee5b2179c2b1b04e SHA-256: 97bc29de75f45ac73eaa1383cdec283d80a4743bd0a576904c2c5f0172946406
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free Robux and game hacks. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of a redirector lure. The document body text and embedded URLs reinforce the social engineering pretext of offering free in-game currency or cheats to entice users to click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/free-robux-websites-that-actually-work-2021-game-hack In PDF document text
    • https://www.appartamenticroazia24.com/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A9F 21372 bytes
SHA-256: 76cf8a09ae9b483be6b3eb9b81d31123043949984e2c9731fd641c50e0eea3fd
font_01_sfnt_off00005965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5965 19840 bytes
SHA-256: 415b7ee37fda4fc7e840ae839cc984cb2b4a0b95548347be2336140620e9a02b

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