Malicious PDF — malware analysis report

Static analysis result for SHA-256 522a655198881ab8…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 05:41:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dca3aa1c3eac2af00765654d625db24a SHA-1: e88d4501607fe619dc2bbb2617d3788c8e46cb05 SHA-256: 522a655198881ab89765657b0a2fe63f5da6636435843745a9e2973743d9a38c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though heavily obfuscated, contains references to the same URL, reinforcing the lure. This indicates a phishing attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/479516143/minecraft-apk-download-free-11-055-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-often-pubg-uc-reviewed_GM1330123889.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005457.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5457 26092 bytes
SHA-256: 457a1530a1f5880cc21481be8f53cde6da9438f77c9cdecbed56b24886a8dddf
font_01_sfnt_off00008f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4C 3136 bytes
SHA-256: 87e3c081d140648b48ae48a5de92552209a483fa726c5e5cbe23965185d5d39d
font_02_sfnt_off00009a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A22 19048 bytes
SHA-256: 3d5d189bc7372af2b38a52366ba09077ddd1bccc7012633974f676ffe4a68d99

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