Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8912ed730601350…

MALICIOUS

PDF

51.4 KB Created: 2021-06-11 02:24:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5695c953263119f8bd6aef6bb266cbef SHA-1: da31c038490976bf240082c55c452797a5afa9ce SHA-256: a8912ed7306013507c98363533eb8d0b2e7118569e9c0f7111376eff48a26b34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as 'free generators' or 'game hacks' to entice users. The primary lure URL is https://netcdn.tw/app/431946152/how-to-get-free-robux-2021-legit-working-100-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9327

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 https://netcdn.tw/app/431946152/how-to-get-free-robux-2021-legit-working-100-game-hack In PDF document text
    • http://internetdeputy.com/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/go-to-gg-com-to-get-202120212021202120212021202100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://internetdeputy.com/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/secret-free-robux_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-rbxrewards_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/greenville-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-gg-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005038.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5038 31100 bytes
SHA-256: 87daa0849b9c6b426f00cf866e1fe743cd8fb0c185d27d9e82727585ec888f45
font_01_sfnt_off0000961c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961C 3656 bytes
SHA-256: 63a179d8a9645bea05c6d53b1776faf4e4a7281930de6cf484e639846bec2e20
font_02_sfnt_off0000a2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D5 19460 bytes
SHA-256: 49a9b72bb2ab0f12221fcdfc9875b881d0d8ac31653f50d08b504a1ef0332e21

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