Malicious PDF — malware analysis report

Static analysis result for SHA-256 af49db78095c3e5e…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 07:38:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bccc1f254a0b341fb1276f2487f45b35 SHA-1: 69e1aa7a059621f17d634e174545d44d49698578 SHA-256: af49db78095c3e5ea7b1b953fea911d6d44f70f21d5e6ae2598fd6d103f87ce1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a URL that is also listed as a known malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and mentions 'wkhtmltopdf', suggesting it was generated by a tool. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/how-to-make-a-minecraft-server-for-free-game-hack In PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.hendrejuniorschool.co.uk/admin/ckfinder/userfiles/files/minecraft-ps4-free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C44 24880 bytes
SHA-256: 765c55ab19ff64a47c22cc2e93a25d6de61be32df39852ad41e6b5f890caecb2
font_01_sfnt_off00008477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8477 18156 bytes
SHA-256: 7ebd6cc6f7d73451d43dfe99dc02d56d86c4e3c51693199467050b16fbe82799

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