Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa3ea3cefe118a58…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 04:56:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5eff0648a01cd654376bed072f789ff1 SHA-1: 30e87fc7b2cbe2910e92fe7e2b46878a759dca08 SHA-256: aa3ea3cefe118a58e60cf22894615171f3fa2bfdbc525dc6cdedc5d2d2b2bfc9
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to external resources offering 'free Robux' or 'Coin Master' cheats. The primary URL, http://netcdn.co/app/431946152/complete-obby-for-free-robux-game-hack, suggests a download lure for a game-related hack. The heuristic firings indicate a PDF link farm and a high ML classification score, supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/complete-obby-for-free-robux-game-hack PDF link annotation
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/pokemon-go-free-99_GM1094591345.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/picture-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/roblox-jailbreak-gui-hack_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/how-to-get-a-free-pokemon-go-account_GM1094591345.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-links-for-free-coins-and-spins-for-coin-master_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_off00002ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE9 22564 bytes
SHA-256: 2d91420930bcac1fa056875cc47eca15c9ff35b1cbe623a948d77085681977da
font_01_sfnt_off00006180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 19508 bytes
SHA-256: 5f182c213f3dd55bb7b4bbc85a9e516199a7318998d544ace23d0cc044439b86

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