Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef06b609780dcaa…

MALICIOUS

PDF

65.6 KB Created: 2021-05-16 00:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c89db8acad2c81fde522c933babf8d0e SHA-1: 2f0efb221ef7115784f4fc70e05571a45a2d2cea SHA-256: 6ef06b609780dcaaa5e573fb92412fef43246c665800d24fe43b4d7bb8f9cb9b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a lure for game hacks and free currency, specifically referencing 'Free Robux'. It contains an external URI pointing to a suspicious domain and a raw IP address, both of which are likely part of a phishing or scam workflow. The document body also contains URLs related to these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6575

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-kid-friendly-no-human-verification-game-hack PDF link annotation
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/fbchampion_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/whats-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/robux-today_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://Buy.HoaxMC.comIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3ENow%20complete%20the%20human%20verification.%20How%20much%20free%20Robux%20offered%20by%20Beastbux.com%20Roblox?%20Roblox%20players%20need%20to%20share%20Roblox%20account%20with%20beastbux%20com%20to%20get%20free%20Robux.%20There%20are%20five%20different%20options%20that%20a%20Roblox%20player%20can%20obtain.%20You%20can%20get%20a%20Robux%20of%20400,%20800,%201700,%204500,%20and%2010000.%3Cp%3E%3Cp%3EBux.dev%20-%20Get%20Free%20Roblox%20Robux%20Generator%20Without%20Human%20Verification%20Millions%20of%20users%20have%20already%20been%20paid%20out%20from%20Bux.dev.%20Earn%20Robux%20and%20promo%20codes%20with%20us%20today,%20and%20buy%20yourself%20a%20new%20outfit%20or%20whatever%20you%20want%20in%20Roblox.%20Robux%20is%20an%20in-game%20cash%20of%20the%20well%20known%20game%20Roblox.%3Cp%3E%3Cp%3ERoblox%20Promo%20Code%20In PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3ENow%20complete%20the%20human%20verification.%20How%20much%20free%20Robux%20offered%20by%20Beastbux.com%20Roblox?%20Roblox%20players%20need%20to%20share%20Roblox%20account%20with%20beastbux%20com%20to%20get%20free%20Robux.%20There%20are%20five%20different%20options%20that%20a%20Roblox%20player%20can%20obtain.%20You%20can%20get%20a%20Robux%20of%20400,%20800,%201700,%204500,%20and%2010000.%3Cp%3E%3Cp%3EBux.dev%20-%20Get%20Free%20Roblox%20Robux%20Generator%20WithPDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000a259.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA259 25016 bytes
SHA-256: 09dc7df4e9762eb825b2ad34f86293eb25fb91ff50e7babae395e9d60d3ce37f
font_01_sfnt_off0000db55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB55 19288 bytes
SHA-256: ea469787df873758e357019bb53a1e3c4242eb718badaf8706c42bdc2f61c813

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