Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ac2dfc894ace15…

MALICIOUS

PDF

43.9 KB Created: 2021-06-08 22:10:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa223298250b3a822201fd18259bd61e SHA-1: 7149e48c0ed872e9bef18bb844a52186e02f0717 SHA-256: a1ac2dfc894ace15b7e6e4b860315092da29c1d43eb0c7b1dbbc631b5d554212
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as lures for game hacks and currency. The primary link, https://netcdn.tw/app/431946152/how-to-get-free-robux-in-script-game-hack, is identified as a malicious redirector. The document body and embedded links reinforce the social engineering pretext of offering free in-game items. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-in-script-game-hack In PDF document text
    • http://sudamericarural.org/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/robux-converter_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-paid-hack_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/live-free-roblox-card_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6F 24868 bytes
SHA-256: f80b36afc1072d41211d626c98aa6fb48b4d7631c451cec3361c58ca42b43c37
font_01_sfnt_off0000880f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880F 18576 bytes
SHA-256: fad81e21066500fe41035161d32cb6687ae55fe62a36f0faa19a5562e4ddf264

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