Malicious PDF — malware analysis report

Static analysis result for SHA-256 11719402a853deb8…

MALICIOUS

PDF

50.3 KB Created: 2021-06-09 07:25:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4a07104e75b5e3ed9117f2b0b4ee965 SHA-1: 29776af668e50149ba722355189fa2a95f3bba15 SHA-256: 11719402a853deb8c94c5ef791a0d882ec666bf90b7499bf95e1bbf174f78e23
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary link identified is https://netcdn.tw/app/431946152/roblox-survivor-cheats-game-hack. The document's structure and content suggest it is designed as a lure to entice users to click these links, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the PDF's nature strongly indicates a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/roblox-survivor-cheats-game-hack In PDF document text
    • http://opac.acehresearch.org/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/pubg-600-uc-in-indian-rupees_GM1330123889.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-2021-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_off000053c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C1 26916 bytes
SHA-256: 47a4e3a51a36d577e1a564661b0214eed0ceb1c12366b167b026faf6dd3f5b7f
font_01_sfnt_off000090fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90FC 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off0000a10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA10C 18656 bytes
SHA-256: 7e6decc7d47fc8cd1573ddfa7c381949c2df3e9c7526865b21253a48de28e18c

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