Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78816395d9709d4…

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 12:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 32a814561dd96ca8c2e153189ec0b25f SHA-1: fdf2ee2f970e7c316c77982d2841036b857d1ef8 SHA-256: f78816395d9709d4f7343a86c692617fe919945dbe59660f9fb29b064cabd036
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9871

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/free-robux-videos-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coinmaster_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-gold-coin-master-village-hack_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F20 35844 bytes
SHA-256: 13473f1e5019be26136e1eeccce3438a1b77911482b6f3e7f093430ae33cfb0b
font_01_sfnt_off00009f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7B 18444 bytes
SHA-256: 1ec21ed17295e3d49cd7a507c4ef3ee968e538ae560c82d8bcc555326bed268a

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