Malicious PDF — malware analysis report

Static analysis result for SHA-256 342f41f38d8836f5…

MALICIOUS

PDF

42.3 KB Created: 2021-05-18 05:08:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d251e3075cec019c9a604707c3bbdc9a SHA-1: cd4717d09f06b11963860b0a94a0637bf2af3f2b SHA-256: 342f41f38d8836f5472c28bc55e0203589d892a63c8ad8e6f6aaf6ff00600787
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at 'https://netcdn.xyz/app/406889139/coin-master-free-spins-link-hack-game-hack'. The document body and heuristics suggest a lure for game-related hacks, likely intended to trick users into downloading or executing further malicious content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-spins-link-hack-game-hack In PDF document text
    • http://mydevice.com.au/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://mydevice.com.au/images/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://mydevice.com.au/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mydevice.com.au/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://mydevice.com.au/images/corn-master_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://mydevice.com.au/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://mydevice.com.au/images/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://mydevice.com.au/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://mydevice.com.au/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://mydevice.com.au/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://mydevice.com.au/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://mydevice.com.au/images/free-coin-master-spins-2021-link_GM406889139.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_003_off00004944.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4944 26060 bytes
SHA-256: 972e0b04a9d230288b4058c8874856dfc3f0f3b8a3374eaa7d0a517085ff11e4
font_01_sfnt_off0000839c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839C 18056 bytes
SHA-256: 654168d3b6bcb61be570e1238605831ee66fed80d87ac67967dd188319cba9ee

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