Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d1bb2209c06243…

MALICIOUS

PDF

33.4 KB Created: 2021-06-20 00:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 41633e4b7aae9311e69bea906d6fb145 SHA-1: ee42bef81607f19579a276a4c772e354b685ddc5 SHA-256: 03d1bb2209c06243bd21a15ebcc5c52fed1f890136277f749b5b98c1251df447
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free currency to trick users into clicking malicious links. The document contains multiple embedded URLs, including a primary redirector at http://netcdn.co/app/431946152/descargar-hacks-en-roblox-game-hack, which is flagged as malicious. The ML classifier also strongly indicated maliciousness, and the presence of a download button lure and callback phishing pretext further supports a malicious intent to lead users to potentially harmful content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/431946152/descargar-hacks-en-roblox-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-com-au_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-no-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-peoples-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-web-store_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/notoriety-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-walking-animation-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/como-ser-hacker-en-roblox-con-el-movil_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_off00003035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3035 21100 bytes
SHA-256: 500591740580d75f23e303e4bd461661df5a4ba53767dec1083d6211c66cccdb
font_01_sfnt_off00005df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF0 18824 bytes
SHA-256: 4d24bc2dfd2b5d03e9f80617cb678385bca8aa43b6f08a45634be5077bcf4f77

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