Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3bc0e82dcc8a78…

MALICIOUS

PDF

53.1 KB Created: 2021-06-03 11:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3d8c402eb8aa789c065b76999de7f390 SHA-1: 5cb5b222339b4972fe99eddd175b9704b3f2aa14 SHA-256: 5b3bc0e82dcc8a78881caf28615903e39151f3c37da7d1be0da7808592b108d0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9616

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/431946152/grabpoints-robux-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000553a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x553A 34288 bytes
SHA-256: 6f360e463931705f98323468e8c05415ddf172e376eeee1b0d37ac8c3a20e6eb
font_01_sfnt_off0000a0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E2 3512 bytes
SHA-256: 20bf1697e2adf851d40ebe6783dfd7e3ad0961666681d856d811a603d9a71270
font_02_sfnt_off0000ac75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC75 18480 bytes
SHA-256: 81e4f6a1b4c560ff48fa89910fbd01a1bd1019ab61c59202556c2e43fcf333ec

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