Malicious PDF — malware analysis report

Static analysis result for SHA-256 19dae5cf0aa172fd…

MALICIOUS

PDF

46.2 KB Created: 2021-05-30 04:12:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 53847f46a3f4c98f46890b561016b8d6 SHA-1: 768115dc511f5192ad6cefce056721b13c62d2cd SHA-256: 19dae5cf0aa172fd3c2324ae3fb1c880af8969d173a73162351a1b9c159e73bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering 'free' game-related items, a common lure for phishing and malware distribution. The heuristic firings indicate these links point to known malicious redirector infrastructure. While no scripts were directly extracted, the document's structure and embedded URLs suggest an attempt to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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/431946152/free-robux-websites-that-actually-work-game-hack In PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://ilya.ro/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-for-robux_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_003_off00004598.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4598 27744 bytes
SHA-256: 613d94b9b7d40c7f1784ea799ecc36d7d7a41c31cccf915e263fef3efbe3dbfe
font_01_sfnt_off000085ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AC 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5D 19252 bytes
SHA-256: f49525d2cb353299e95430044cca9c62699809686ebb763340304ea0e82a2cbb

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