Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e82b598ad452587…

MALICIOUS

PDF

46.6 KB Created: 2021-06-04 03:53:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b2b229b15bc2cd665be38a86c296fa2a SHA-1: 906b9c87363128307b4c7eb055b6b891f7218d46 SHA-256: 0e82b598ad452587f4eb8337867ecb85a6e01b2caff48f189928a86f7755e47f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising a 'Coin Master 2021 Free Spins Game Hack'. The document body and embedded links strongly suggest a social engineering lure to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent through redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/coin-master-2021-free-spins-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005085.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5085 24608 bytes
SHA-256: 63859dfd7fb62cc5d1dec9716a09997ba93585ed50574956bec814fa464ba296
font_01_sfnt_off0000891e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891E 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9309 18288 bytes
SHA-256: 512188fbd9df787eb973cc190579836d1eec1c2cf91c6a5c2e6dbe230c0a69fa

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