Malicious PDF — malware analysis report

Static analysis result for SHA-256 0927963b70a228e2…

MALICIOUS

PDF

43.9 KB Created: 2021-05-16 03:10:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a48284f9f8edd399e56f1531cdc7ba8d SHA-1: 11c5ef33f1fe7a7958ecbd8e27a9efe76ed4e4ee SHA-256: 0927963b70a228e223a0994a7fd145aebd310283cc31ff5de50eaf8e3ec984dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a lure of free game items and hacks to trick users into clicking malicious links. The document contains multiple embedded URLs, including a primary redirector at `https://netcdn.xyz/app/406889139/free-spins-and-coins-coin-master-links-game-hack`, which is flagged as malicious. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this file is designed for malicious redirection and potential further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-spins-and-coins-coin-master-links-game-hack In PDF document text
    • http://ktn.com.br/images/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://ktn.com.br/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/best-minecraft-hacked-client-2021_GM479516143.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_off00004976.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4976 23776 bytes
SHA-256: 1587e914d1d3d6c482a74f6625987cb6be36585821fe8cb437445dc24f524d56
font_01_sfnt_off00007f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000890a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890A 18228 bytes
SHA-256: 69b56589237c96fdda83d18de15f7bb650a68c91d961ede8b08ce7eda2bec3b9

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