Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1448548a4d96890…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 20:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f20585e594df59bfcabed44af4489c91 SHA-1: 1de4adf1adc9233864490fbf8580efd533f5759a SHA-256: d1448548a4d968900de9ff09444d684a0c579717f25f9e51447efe175da522a7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/roblox-promo-codes-for-free-robux-game-hack PDF link annotation
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/demon-roblox_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-daily-free-spin-and-coin_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_off00004b0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B0D 24440 bytes
SHA-256: a5b27120652186b9734c85c526609cf88bff60251f166bcd1d5b43f063da3ee0
font_01_sfnt_off0000830f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830F 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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