Malicious PDF — malware analysis report

Static analysis result for SHA-256 18923b3074674f20…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 12:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 18d334fed27e2ccfac2251ee7d7271ca SHA-1: 94a9b6f58dd89f710e88dc66bf565a0fd0a6811f SHA-256: 18923b3074674f204cc57502303091fc05f74e2bea95386c5f94a7657edb8588
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically http://netcdn.tw/app/431946152/roblox-com-www-game-hack, which is flagged as malicious. The document body and heuristics indicate a lure for game hacks or generators, a common tactic for phishing or malware distribution. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.tw/app/431946152/roblox-com-www-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hacks-thumbnails_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-wheel-spin_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-inspect-2021-saves_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-nike-shirt-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-money-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/i-need-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-acounts-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-hack-mac_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-trade-currency-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/earnbux-free-robux_GM431946152.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
font_00_sfnt_off00002ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA7 22264 bytes
SHA-256: c36d47e3f0405e4f3c9eda342bc94e4e42e8198252213494df5bb7a1d84a8422
font_01_sfnt_off00006041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6041 19108 bytes
SHA-256: 13c262cfb7031e1ca070be9c3125d0123a2d05a8500d35be8507854e43fbc492

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