Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48df9da713dfd18…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 17:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9fcaba6033e52f3e8a6d4e764a39973d SHA-1: f2f25298a52d726b204251309982fc8bfa292514 SHA-256: d48df9da713dfd186167ed6fd487623ac26f07694bafb9a1ae7b14a1da4e9a10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, disguised as free game hacks or generators. The heuristic firings indicate that the document is designed to lure users into clicking these links, which likely serve as a delivery mechanism for further malicious content or phishing attempts. No scripts were extracted, but the presence of malicious links and the lure content strongly suggest a phishing or malware distribution campaign.

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.co/app/431946152/free-online-games-similar-to-roblox-game-hack In PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-hack-roblox-murder_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-free-robux-legit_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-card-giveaway_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/robuxmaniac-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-free-obc-on-roblox-test-site_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/roblox-pokemon-games-free_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/server-sided-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-roblox-accounts-with-obc-2021_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-codes-2021-march_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-free-dominus-and-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_off000030eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EB 22472 bytes
SHA-256: ac39622c702d5f438c854ec23fe007851b328dbacf36d640ee8dee08477023ab
font_01_sfnt_off00006308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6308 19032 bytes
SHA-256: ac9ce99468a08480ff9ea8e47be87ddd79854dbd567441b7613737ee42443a9a

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