Malicious PDF — malware analysis report

Static analysis result for SHA-256 33565e74d313435c…

MALICIOUS

PDF

45.3 KB Created: 2021-05-11 17:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e5253896d28a495c0726111a52bd814b SHA-1: 09633b4201799c6889c3edc8dc59c9bd7feb5bd8 SHA-256: 33565e74d313435c8a1ba3779f3ae1fa42208b780d3bc91014f6008f6628ebae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generators" for games like Coin Master. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the embedded links and the nature of the lure suggest an attempt to redirect users to potentially malicious websites, possibly for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/online-coin-master-free-spin-app-game-hack In PDF document text
    • https://edu.kyst.com.tw/image/data/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/robux-offers_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4C 25212 bytes
SHA-256: 5c12e54dd9c44dc955f5c20da39c895a3368da4776ceceaaa70858dd89688ddc
font_01_sfnt_off000085a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A7 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F91 17960 bytes
SHA-256: 00bab635c2a0cb1a50d20431aa9d2604bce9bd5ee105395901c4159e72e6ab85

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