Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ebba925b9ed6e5…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 19:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b8e72598916157f364501a8b34a3814a SHA-1: 917d902a2b62c1423a0af4389da939de8626d390 SHA-256: 61ebba925b9ed6e51cf20dc5d2b191dc1e25c08d90b12f83351172ba440eb367
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 0.9971

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.xyz/app/431946152/how-to-get-robux-for-free-2021-game-hack PDF link annotation
    • https://razredna-nastava.net/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-client_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004990.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4990 25888 bytes
SHA-256: aac322edc8c01a8842911c355429c4f1107c73831bb16fc7f5419e1fe9279e8b
font_01_sfnt_off0000835b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835B 18684 bytes
SHA-256: 65f445f0396e54760dd2a1edc1744209422bc48f29c35ea74a9bcb72e79f8b06

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