Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b5963a2762f412…

MALICIOUS

PDF

43.3 KB Created: 2021-05-15 00:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a600cfc405ad133cce6442a48b090ab6 SHA-1: d58164917f358a728ca7cc3ee365f816194e9f68 SHA-256: d6b5963a2762f412b9aa649e8a4e1dd8050c6040d553a53dd3820932cc6d3150
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and SEO manipulation, specifically targeting 'free Robux' or game hack lures. The document body and heuristics indicate a clear intent to redirect users to potentially malicious sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-without-verification-game-hack PDF link annotation
    • http://www.dolciariavarone.com/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://www.dolciariavarone.com/images/flip-master-coins-hack_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_off00004917.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4917 25768 bytes
SHA-256: 3c7a27c696327e37c5bda8ce2be766bf50ca1027f1bbcc9fdaa7ce722d4e9f9a
font_01_sfnt_off000084d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 18964 bytes
SHA-256: 5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef

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