Malicious PDF — malware analysis report

Static analysis result for SHA-256 735282f527ab233f…

MALICIOUS

PDF

36.0 KB Created: 2021-07-08 12:50:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6409c27720c90a071cbd502d6e7f9db2 SHA-1: 163021924b591933759cd98879b7d60cd5b52a51 SHA-256: 735282f527ab233f3bdc6a74ddc0e68bc86414cf40cd5b479b9e3f178861a515
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and currency generators. The primary lure directs users to 'netcdn.tw', which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive traffic to potentially harmful sites, likely as part of a phishing or scam 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.tw/app/406889139/25-free-spins-coin-master-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-robloxian-high-school-free-coins_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/get-free-robux-legit_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/inyector-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-no-human-verification-jeuxvideocom_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-tiktok-followers-without-human-verification-2021_GM835599320.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-clothes-on-roblox-app_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-hack-for-robuxs-on-robloxs_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-pc-free-download_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.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_off0000354e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x354E 23264 bytes
SHA-256: d8b2415825ebbd2e56cbacb457aa78ae2152bce7df073dfffebab353098c5315
font_01_sfnt_off000069ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CA 18432 bytes
SHA-256: ec79058dc3660cd38899abd0af6a529c62159de1466b2a8febb865623eb50a1d

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