Malicious PDF — malware analysis report

Static analysis result for SHA-256 0944c4a99035892e…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 13:25:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 28296feed4e0cfdc1c2e167d146cfa5d SHA-1: de4dd3ad76e5178599f1a9b0c5bb1c1f5e155381 SHA-256: 0944c4a99035892ed3ed67d104320ec72f1bf24d4fd79894be3665c7ec3b0224
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple external links and a lure related to 'Free Robux' and game hacks, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-websites-no-human-verification-game-hack PDF link annotation
    • https://www.smartitbg.com/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox-girl_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-hack-online-2021_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
stream_003_off00004731.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4731 27104 bytes
SHA-256: 0a0dedc777cb18e047c37de3669453a9d365b63335ee145b970e04a0ffe09c7a
font_01_sfnt_off000085f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F0 19056 bytes
SHA-256: b278ed256549c6e4f6c448dba943d0e72c7f64ebe7340c12334ea4705f26c648

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