Malicious PDF — malware analysis report

Static analysis result for SHA-256 773fcb730c7724ff…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 14:43:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ade4a76767366c243896078b623e46b5 SHA-1: 84484430d0a79e999542140fe8abb25fd9cbb3b3 SHA-256: 773fcb730c7724ffd97fe299836738eeab3513263931052da935e6a7aab62e1c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with 'game hack' and 'free spins' content. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures indicate a phishing or social engineering attack, likely leading to a download or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/get-free-spins-on-coin-master-no-human-verification-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pubg-uc-hilesi_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/inject-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000507c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507C 25512 bytes
SHA-256: 8cc9913574026a2687275f8f86ab0472d6b88f60db1401848716e623e9de225f
font_01_sfnt_off00008a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A18 18420 bytes
SHA-256: aaf073635ea6c22c09bb96c4932f7cf7a5897db2b80a5630abe18a56f2e635cd

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