Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b34a74a95843c2f…

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 23:44:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 91ed09f924b0d04d97494ea69d6d7cd5 SHA-1: 89b1ef6040f00f00a84a729c0bf266c25cc2b152 SHA-256: 0b34a74a95843c2f79f5a536526681bf37b959a561130820eca3ef93bcc3b8f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators for popular games like Roblox and Coin Master. The primary lure URL is http://netcdn.co/app/431946152/roblox-stylish-animation-pack-free-game-hack. While no scripts were extracted, the embedded URLs and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-stylish-animation-pack-free-game-hack In PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/roblox-lumber-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id//repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id//repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/citizen-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/how-to-get-free-money-on-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/free-candy-van-roblox-script_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id//repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/free-livr-emerald-giveaways-roblox-direct_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id//repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF2 21696 bytes
SHA-256: 556bf200af6201c6e702eabca5b6692c3c8655acf3dd8e7fffda70f64b963880
font_01_sfnt_off00005f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6C 19804 bytes
SHA-256: 95a2a20c23658bacbe8286b8eec6dca1f891aebc3d923becff05a8e4b7c18f89

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