Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37ed2edf6eab590…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 07:47:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 28ba1d62a31fe5ad6da21131795a238c SHA-1: 9391ce9247f148a6b1c1cda767306269a94f5699 SHA-256: f37ed2edf6eab590444a210606e92fd9304c74a11da513addecb3d55ff836458
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/download-hack-coin-master-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/roblox-pokemon-brick-bronze-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-apk-hack-mega_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/play-roblox-free-online-now_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/pet-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-how-to-get-rid-of-the-anti-cheat_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-ip-address-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/booga-booga-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-super-hros-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-do-you-hack-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-cards-not-used-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-activegamer_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_002_off0000330a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330A 23260 bytes
SHA-256: 59f19d9c6e7ee1394acb7319ef0d037be3b2824bc2158c33eb0c554a8a22e644
font_01_sfnt_off00006783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 18584 bytes
SHA-256: 1c1203a1d4a887c175dab2b1e0fbad6499f2d3e5611c1b83f9ce1eb446d2c3ab

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