Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56fe6c14d67996d…

MALICIOUS

PDF

48.3 KB Created: 2021-06-11 07:45:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5a3bedfa3bfad9a6af9e599cd0996433 SHA-1: 6ad301bfca593418977e774a647dc6af9970abcd SHA-256: a56fe6c14d67996db2ee3c66ebc9fa3347cfd9b6ec3422fb7819f8384ab8f61f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirector infrastructure, specifically designed to lure users with promises of game hacks or free in-game currency. The ML classifier also flagged this PDF with high confidence. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-hacks-for-mac-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-robux-in-roblox-script_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-today_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hack-coin-master-apk-32-download_GM406889139.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_004_off000052f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F4 26652 bytes
SHA-256: 823539e3bb2b05a45c86f38928b792f5f10799b855c698ae195cf7e9f7a6809b
font_01_sfnt_off00008e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5B 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000980c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980C 18944 bytes
SHA-256: 7ac07c6219fd7e17feae7e1eeebb1bb4c85bfff00b2b20702d63eca6549831fe

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