Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dd7ed3f5bdf40a…

MALICIOUS

PDF

52.7 KB Created: 2021-06-08 11:48:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b9160e6f68b76f9ca383e3f8d8e9f184 SHA-1: 1fa18c68ea37bbf4fd2df219d61ef4a630473f9d SHA-256: 23dd7ed3f5bdf40aa367fd98165cda39fc680f1e3771e9e4a81c484225494bcc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9657

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.tw/app/431946152/roblox-parkour-level-300-hack-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-coins-coin-master-spins_GM406889139.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
stream_004_off00004ed0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED0 25884 bytes
SHA-256: ecbda96e52a56add14f8392e6844d08881cb5cd35745b3bc12acc69c21f764f6
font_01_sfnt_off0000898b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898B 5844 bytes
SHA-256: 0ee3943bd64a42f4d4574891b261ce7aa1092318d55ad88ff199be262e6ecc01
font_02_sfnt_off00009d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3E 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off0000a931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA931 18936 bytes
SHA-256: 9609b42ad0b991a44d49f87b7b63ac2aa1671f6f1775247ce93df6276cdf1192

Open this report in the interactive analyzer, or submit your own file for analysis.