Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b83863cca5b356c…

MALICIOUS

PDF

51.8 KB Created: 2021-06-03 14:16:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4c4a148fef25ce0f5fe1fd6a7a7b37da SHA-1: e786de05b02dccb8750294182ffdad8b8c41f4e4 SHA-256: 7b83863cca5b356cf9dcc49fc385a173ee881a6e6a0e5596b3288ed6584ca90d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on 'free Robux' and game hacks, indicating a lure for users interested in such topics. The heuristic firings confirm the presence of external URIs and a game hack redirect lure, strongly suggesting the document's purpose is to drive traffic to potentially malicious sites. Although no scripts were extracted, the document's structure and embedded links point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.online/app/431946152/apps-for-free-robux-game-hack PDF link annotation
    • http://pustakafpsi.uin-suska.ac.id//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/pubg-uc-on-discount_GM1330123889.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5398 25520 bytes
SHA-256: 916d4dd8b507a5253a774a660329ec611b10f28cbd2c2837c6e8fea3c5d5921e
font_01_sfnt_off00008e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4C 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEF 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA801 18192 bytes
SHA-256: b6bed13222f637b3eaa93fd3412fcfb5f097d091c9d6b8306e759aa57a7fe68b

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