Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b80c4ad34724ac…

MALICIOUS

PDF

42.8 KB Created: 2021-05-19 02:06:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: becc663213fe3d7df771363f979e1865 SHA-1: 7600d9b406f29033bddcaae9de0cfc253ef07f75 SHA-256: 28b80c4ad34724acb803a404085354fe187447e3e3d1e6e7b3be64eac2e35d0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators". The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-real-hack-game-hack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads. The ML classifier also flagged this PDF as malicious.

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/406889139/coin-master-real-hack-game-hack In PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spins-16-04-19_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7F 28788 bytes
SHA-256: 6495174b0e8139b9952c63ca63350fff35116cd1f1fb88dd7baef77edc07ffd7
font_01_sfnt_off00008669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 17788 bytes
SHA-256: 17f046e272c8ee70cc4b817224b52c180b33e2590cfcc2d916d545b5a6c5f49a

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