Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c1eb619e90941d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 20:40:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9e7aba2a1499cf74948c814510e1eb88 SHA-1: 01af852ad0cddba249603cae4deab3f13f249d60 SHA-256: 78c1eb619e90941d14167c9f07be6eb4f8bdf86a7dfeb5a9c6dd5dcd893220f7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to trick users into clicking links that promise game hacks or generators. The links redirect to external websites, such as http://netcdn.tw/app/479516143/toolbox-for-minecraft-game-hack, which likely host further malicious content or phishing pages. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic to distribute malicious content.

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.tw/app/479516143/toolbox-for-minecraft-game-hack PDF link annotation
    • http://perpus.i2s-learning.com//repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-script-hack-list_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-a-lot-of-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/expliot-box-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-robux-hack-no-survey-or-download-u-said-tags_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-jailbreak-free-keycard_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-got-talent-piano-hack_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_off00003103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3103 22512 bytes
SHA-256: 5db6448c366b5e4ba3fffe972bba32525640beaa7d389f692ea554aae351b77c
font_01_sfnt_off00006330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 18440 bytes
SHA-256: 1cf31c3bb7bdb96ad8627629978fa978d99bbfc1b3e6ff44e7e3c3bf643f3fe7

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