Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ed719212153894…

MALICIOUS

PDF

44.2 KB Created: 2021-06-06 23:48:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3e6559d88792519cf422156ad08f110f SHA-1: d0e7fb8b20b43af8adf5aaa139b634ff81d5a26c SHA-256: 17ed7192121538946b8143d9aef95faf455a4b69e766b9c267ed46f82f5c378d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirectors and infrastructure, disguised as 'game hacks' or 'free generators'. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded links and the nature of the lures strongly suggest a malicious intent to redirect users to potentially harmful sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hacks-for-mac-on-roblox-game-hack In PDF document text
    • http://salantiskis.lt/images/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://salantiskis.lt/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://salantiskis.lt/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://salantiskis.lt/images/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://salantiskis.lt/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://salantiskis.lt/images/get-free-robux-com_GM431946152.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
stream_004_off00004f6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6C 25956 bytes
SHA-256: d713a31bfcf3c111231676806da3d406dcf663b59635b70f1bee7f70e5e48390
font_01_sfnt_off00008958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8958 18544 bytes
SHA-256: 1fe07474ea8876155a7ea05ef5a56926d3348d10a7b36158bbb10eed9d1fb9ca

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