Malicious PDF — malware analysis report

Static analysis result for SHA-256 a406a4508e196dd2…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 06:27:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 11e0934378db459c32ac0a2945a77445 SHA-1: 89a068aeeddf9d451a68cebbd0167d612b8635e5 SHA-256: a406a4508e196dd2afd47334732239f328482c278d15398982329a7dbee094b3
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 generators. The primary malicious URL identified is https://netcdn.online/app/406889139/como-hackear-juego-coin-master-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting these sites, likely for further malware delivery or phishing.

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.online/app/406889139/como-hackear-juego-coin-master-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-hack-free-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005378.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5378 25336 bytes
SHA-256: 81354bb8712b4ca0781011f373ab9aa2efffa6908692cacd8492860b326cd902
font_01_sfnt_off00008ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA8 18572 bytes
SHA-256: 08bd6afb78e7ba164a11b6bcff14b084761992f6b80076210b252904e123869d

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