Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fa9941b7bfd080…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 10:51:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c862c7510bb369ddbd7d5dae7cea98a4 SHA-1: 2a588eeb53454c6ab438be7bd81240268dc92a24 SHA-256: 89fa9941b7bfd0807ba730ec190c04087384507c47a78fd56a61ecf060c0a275
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links designed to lure users into downloading game hacks or generators, redirecting them to malicious infrastructure. The primary malicious URL identified is https://netcdn.online/app/479516143/minecraft-client-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to trick users into downloading potentially malicious second-stage payloads, aligning with a spearphishing attachment tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/minecraft-client-download-game-hack In PDF document text
    • https://opac.heritagejkt.org//repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/visenya-roblox-exploit-free-download_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-game-hack-link_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_off000054a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A4 25600 bytes
SHA-256: 924ae980256b0d22bcd843d0daf70846dd7902fc0468502c4635886a549b6215
font_01_sfnt_off00008e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E55 2824 bytes
SHA-256: 32afe7424993ed77feed76f83a3afdb3d3391dbb877b7f4b0d7509f28dd06233
font_02_sfnt_off000097fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FC 18292 bytes
SHA-256: df528b26126d4fc11b7eeaa3b1f911f76ffca14ff52ae065bc56290066d0d251

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