Malicious PDF — malware analysis report

Static analysis result for SHA-256 607aff0f192ea4b3…

MALICIOUS

PDF

44.8 KB Created: 2021-06-04 03:49:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8b3f43e6ace4cb878b6988a440bac90b SHA-1: 31916ac2946c45659d9e244ac92b5c536e10d65a SHA-256: 607aff0f192ea4b328880384d787179ddc1d230c3f9593045dcfb1dc9ea887ed
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 0.9865

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 https://netcdn.online/app/431946152/free-robux-com-2021-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/is-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/pokemon-go-free-incense-promo-code_GM1094591345.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/pokemon-go-free-online-game_GM1094591345.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-blogspot-free-spins_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_004_off00004e79.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E79 26288 bytes
SHA-256: 01b3f6e5feb93fedece58ab0a1ccdc503fb7166c294bb4724361cbd40905a467
font_01_sfnt_off00008b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B65 18676 bytes
SHA-256: db7deb15448d884d15c6a42f746ab8a768d26593fd7e085f0109997e06cd96ff

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