Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf43d2972393d6f…

MALICIOUS

PDF

50.7 KB Created: 2021-05-31 13:56:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9199b601ee380f6387339dd95e2e7510 SHA-1: 3ed3a89e8207f7f7d4638a51c6579d3d5ff28099 SHA-256: 1cf43d2972393d6f33219154d8f055582b70588f9b716a251c2404f24488511c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack lure that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the heuristic findings. The ML classifier also flagged this PDF with high confidence, suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/how-to-know-who-is-hacking-on-roblox-killing-everyone-game-hack In PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/hack-money-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/super-nice-mml-hack-roblox_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-free-play-no-download_GM479516143.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_004_off000053d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D9 34172 bytes
SHA-256: c6a13df7558890af8d84c40ebe291ccdbf3885ebd592294356660d50f4a0bb2a
font_01_sfnt_off0000a0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0C3 19412 bytes
SHA-256: 36be40d27d7c3e2e396032247db4ac3bac5928b9e3527faa421f218e06536f24

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