Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df6c5fe51b827cf…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 07:06:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5e35ff95036a483a8d861a3c2bfcad4d SHA-1: ac73005332b63514697798577ad005a83f517428 SHA-256: 9df6c5fe51b827cfeb3fd3833bbf6c171c7fc77b8ff436a736e3622691da9057
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary link, http://netcdn.tw/app/406889139/gamesofficenet-hack-coin-master-game-hack, is flagged as malicious. This suggests a social engineering lure to trick users into downloading further malware or visiting malicious sites. The ML classifier also strongly indicated maliciousness.

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/gamesofficenet-hack-coin-master-game-hack In PDF document text
    • https://allpromise.com.tw/image/data/files/hack-roblox-crazzywhatever091_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/get-viral-on-tiktok-free_GM835599320.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-no-website-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-robux-pc-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-do-you-get-admin-commands-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-codes-february-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/cheat-engine-mac-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/hack-web-tool-roblox-descargar-gratis_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/como-tener-hack-para-en-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off0000308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308B 23012 bytes
SHA-256: 061fd09071b0635b3ed37709f0c5778ec23349e38a40f7f32f928ea625b76c8d
font_01_sfnt_off000063dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DD 18264 bytes
SHA-256: 818d165fc4df5bed29684778c9de9785090096a7435674cb43da4223c2e2e8d5

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