Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b940eff8a0ab00…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 21:52:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5f0aae1e98af52395490f691d49148fe SHA-1: 550f46577fa7ddf2c7518b42b22d3ead17d522ce SHA-256: a7b940eff8a0ab008c2bd16fa2f5be20ce4280b2bf0774060d308fb666acaec3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and gift card codes to entice users. It contains multiple embedded URLs, including a critical redirector link to 'http://netcdn.tw/app/431946152/free-robux-gift-card-codes-2021-game-hack'. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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/free-robux-gift-card-codes-2021-game-hack In PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/roblox-jailbreak-noclip-hack-download-in-description-patched_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/roblox-hacked-codes_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/exploit-cheat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-robux-with-jus-tusername_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-online-computer-games-roblox_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/hack-that-can-bypass-new-roblox-update_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/hack-generador-de-robux_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/cool-free-roblox-outfit-without-clothes-and-colour-body-2021_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/chesskoo-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/city-life-man-roblox-free_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_off00002f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8C 21816 bytes
SHA-256: c488d80dbe797c3e0df7b30887db535152372f715afcd65718dccfa61d467e92
font_01_sfnt_off00005fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA0 19516 bytes
SHA-256: 29e75f30c5e86761bb92b3b01e6b6c9178fe3a430d56702e6e4d31a38e0984ae

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