Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca6dc18c3654fba…

MALICIOUS

PDF

49.8 KB Created: 2021-06-03 07:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4e0db543c984ab75320966ff6b2a462b SHA-1: 5422872135175a96940a858c5f7c052faa980e0f SHA-256: aca6dc18c3654fba5467b0cad85e4d4c4b286ff6f29c3b93b45bff1c8711a27c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that claim to offer game hacks and cheats, indicating a lure for users to visit potentially malicious sites. The ML classifier and specific PDF heuristics strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack.

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.online/app/406889139/archery-master-3d-hack-unlimited-coins-cheats-game-hack In PDF document text
    • http://librarystkippgribl.com//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pokemon-go-free-shiny_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/real-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-no-human-verification-or-survey-or-download-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000532d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532D 24844 bytes
SHA-256: a8917f3f26acdfb44bd1287ffdd0a98e7b64b5bf1a3ec7a8d52536cb50de6107
font_01_sfnt_off00008bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB9 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD2 19100 bytes
SHA-256: c55e628fade52bbbc486514e587815b26eabd5f3f95c570500a33c627fffcb41

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