Malicious PDF — malware analysis report

Static analysis result for SHA-256 33622849ea6b98a7…

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 23:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 47b9708042695a5161ac6ca82edb9c00 SHA-1: 6c57dcf6c75546a78e1ff8270189dc93c951b481 SHA-256: 33622849ea6b98a7781a975ac1c50477c2d6eb4ea2f8b0c09374ccd7dec9c5e6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-change-team-hack-game-hack PDF link annotation
    • http://slim.sisminkada.net/repository/how-to-get-200-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-glitch-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-play-roblox-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-tiktok-emails_GM835599320.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-mm2-coin-hack-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/strucid-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/full-inside-the-world-of-roblox-pdf-free-download_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-ways-to-record-roblox-with-voice_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-in-roblox-2021_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
font_00_sfnt_off00002e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E55 22288 bytes
SHA-256: 0590daaf0530cfb577032d090b35843934c078b825d5cd27c8fe1598e6aa23cf
font_01_sfnt_off00005fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 19084 bytes
SHA-256: 87a4ddf7a60f5c89c66a6418be2386d65d963c32ee355a0a9e8edf6ae41f5eb4

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