Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1f9c39709716ed…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 09:12:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e7296eff4aaf8e61fa0fe6244f757d49 SHA-1: eae6c2a8c85f81fe2ef39d43dd95a11997128ffb SHA-256: ab1f9c39709716edafbe881d6c2d46249912d50599f1eadc152521522e561f38
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a "free generator / game hack" for Minecraft. The document body, though heavily obfuscated, contains references to such lures and embedded URLs. The SE_CLICKFIX heuristic suggests the document may also instruct users to manually execute commands, potentially to bypass macro restrictions and download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/how-to-get-minecraft-windows-10-for-free-with-java-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-a_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spin-ml_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
stream_004_off00005409.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5409 24668 bytes
SHA-256: 564a3211bba695abe9e847b066762c4a0ababfdb354827d1639bc6f30f0541ed
font_01_sfnt_off00008ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCC 18972 bytes
SHA-256: 8e658ed9ffe7233ae998901bc6eec399b36e43f77efcaafe704fa409c54d4733

Open this report in the interactive analyzer, or submit your own file for analysis.