Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e93528fe67ca43e…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 06:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0e4346d72bd9b87ef468c4cb3b29e1dc SHA-1: 2d1ac390795c99279037632773991ea4bb266997 SHA-256: 2e93528fe67ca43efb92883bf505f2e98397f0bdceead23f301fb5246e6eb480
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-hack-for-lumber-tycoon-2-game-hack PDF link annotation
    • http://mbbs.hr/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-easy-and-real_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-change-your-username-on-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-kohls-admin-house-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-for-samsung-s3_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-daily_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_off00002eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEF 22552 bytes
SHA-256: f70f0154eb680a52780718681daf90f24dd046a95779e8dd17a4b22bfb64da2f
font_01_sfnt_off0000611b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 19524 bytes
SHA-256: 15db668bfa944b03791313a6ffe01160bef3e49d0ab4c648a6ce23da154f54a9

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