Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e3d2e1e3e63300…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 16:41:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: adab1a99f92b520ab220268717ccffcb SHA-1: 47a46c71fac96eaa7d62fd737d99765151569047 SHA-256: 26e3d2e1e3e63300027c2931ec7a32d7c371d554c4fd2648e29a9e9e7dae5541
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators". The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-hack-without-human-verification-india-game-hack. This lure is designed to trick users into clicking through to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or social engineering attempt.

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/coin-master-hack-without-human-verification-india-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/one-player-game-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/counter-blox-roblox-offensive-hack-download-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-be-a-roblox-admin-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-tiktok-engagement-calculator_GM835599320.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_002_off000032cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32CD 23172 bytes
SHA-256: 90aa18afa912bd442e83f25407e0512a706ed8dde6eecfbe42fab38b1c402f2a
font_01_sfnt_off00006700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 19076 bytes
SHA-256: 5a923ff08e7318c3a9c8736db5a5b2755814f854ec7f5c8b5bbbefeeabd9ec4c

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