Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9802c2ad00bdb61…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 21:56:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4da3396eb7a2f94deed8a8187ce09e9e SHA-1: 13e404f4a7371b8a3ed62ef11317dc130dbe962e SHA-256: f9802c2ad00bdb61dda2a8ca6ff7f97ae4865780c02a7e4f29f35cb4957e318c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary redirector URL is http://netcdn.tw/app/406889139/need-free-spins-for-coin-master-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a social engineering lure to trick users into visiting these sites, likely leading to further malware downloads or phishing attempts.

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/need-free-spins-for-coin-master-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-catalog-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robloxgiveaways-top-hack-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/nilamyt-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-sha-vaca-do-roblox-id_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-install-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A3 22620 bytes
SHA-256: c56446cf8c20365d321f1d9e8539d2e8ef54064b8f7636c50a598e9ff3e63e3e
font_01_sfnt_off0000632d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 18348 bytes
SHA-256: 3957c128dc793e62d1304d4284793c4a4087ddceea17158896e7adcb416da0fe

Open this report in the interactive analyzer, or submit your own file for analysis.