Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb37f30a5172b288…

MALICIOUS

PDF

36.2 KB Created: 2021-07-07 22:54:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9597544881b85d533879ef19db30b815 SHA-1: d05fb7614a0ec10b66f4caf66e894155adc647eb SHA-256: fb37f30a5172b288450a21ab7a1d495dc5c2c4c6d9639407be51f72d451428ad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9980

Heuristics 4

  • 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 http://netcdn.tw/app/406889139/free-daily-spins-coin-master-2021-game-hack PDF link annotation
    • https://dentmate.com.tw/image/data/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/exploit-engine-roblox-free_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-robux-quick-easy-cheat_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-networks_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/lumber-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-cc_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-int-a-friends-roblox-account_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/ash-greninja-shuriken-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-prison-life-hack_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003408.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3408 23400 bytes
SHA-256: fe08e20ba9b11a1fb6eeedf6633104b8cb37213567b1c8ce5a8cdca5c3f4ae5e
font_01_sfnt_off000068b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B1 19000 bytes
SHA-256: bff5cd883eb4370b15e965f4fd1aca22479e39b86b51e1d2e4068a25e0992d6d

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