Malicious PDF — malware analysis report

Static analysis result for SHA-256 b907c64b21652007…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 07:20:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 906b8eb7dc89f131786aca6b9c719999 SHA-1: 97ea955eaf7622ed17d0b68fdf6039b503e397d2 SHA-256: b907c64b216520079d9be49f115e9176da91074b25e61f15d13aad73c6711a59
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a lure for 'free Robux' and game hacks, indicating a phishing or scam attempt. The primary URL, http://netcdn.tw/app/431946152/free-robux-no-human-verification-or-survey-or-download-game-hack, is identified as a redirector to potentially malicious content. The document's structure and content strongly suggest a social engineering tactic to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-no-human-verification-or-survey-or-download-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-roblox-gameplay_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/pokemon-go-free-kanto_GM1094591345.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/passengers-in-free-roam-in-flight-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-items-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-a-bunch-of-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-membership-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/military-base-roblox-free-model_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-200-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-change-a-leaderboard-using-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/blox-pink-robux-free_GM431946152.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
font_00_sfnt_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 22540 bytes
SHA-256: 3b729f00b0607d40584c7f5d1fd66368fafcf9b587e68615a6bdccd467536376
font_01_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 20208 bytes
SHA-256: 76b0661ef1631e3ff5be93da9b7a1da7a58595af6d3396f266def641a9cc9522

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